Educational Innovations

Magic Sun Stone

Get a magic sun stone (rough gem quality iolite) here: 

From eBay: BUY NOW: Iolite Sample
From Amazon: BUY NOW Iolite Sample 

Affordable polarization filters and other polarization physics available here: 
From Educational Innovations: BUY NOW Polarizing Film Kit 

The kit also includes a birefringent crystal, colorful optically active mica sheets, and a polarimetry demo that reveals when structures are under stress. A great value for so much physics fun! 
Get the nice display stand here: 
From eBay: BUY NOW Caliper Display Stand 

Magic Sun Stone: gem quality iolite shows very strong pleochroism- its color depends on the polarization of light as it is transmitted through the crystal. The color of this rough iolite gemstone changes dramatically from clear to opaque purple as the orientation of a linear polarizing filter is rotated through 90 degrees. Also known as a "Viking sky compass" since it can detect the polarization of sunlight in the sky and thereby locate the sun for navigation even on cloudy days or when the sun is below the horizon- useful for this time of year far north. 

Polage Display

Austine has an online gallery of her amazing work. 
From Austine Studios: Polarized Light Art 

This kit has everything needed to make your own polarization art: 
From Educational Innovations: BUY NOW Polarizing Film Kit 
The kit also includes a birefringent crystal, colorful optically active mica sheets, and a polarimetry demo that reveals when structures are under stress. A great value for so much physics fun! 

Sometimes Austine's work can be found on eBay: 
From eBay: BUY NOW Polage by Austine 

Here is a very nice discussion about polarization that pertains to Polage: Experiments With Polarized Light by Donald E. Simanek 

Polage Display: art with polarized light using polarizing sheets and cellulose to create changing forms and colors. Rotation of the filter allows the artist to produce colorful metamorphosis. This piece was created by Austine Wood Comarow- the main developer of this art form- as part of a campaign to promote Maui Jim polarized sunglasses. Light has an orientation, denoted as polarization, and a polarizing filter can be used to block certain orientations. The colors in polage come from how the molecular structure of plastics can rotate the polarization of any light that passes through- but only light corresponding to yellows and greens gets rotated in plastic, reds and blues not so much. Polage uses different layers of plastic to rotate the light, and then polarizing filters are added to allow only certain frequencies (colors) of light through.

Van de Graaff Generator

This device is sold as the "Static Shocker" hands on lab. Get one here for $8.95! : 
From Educational Innovations: BUY NOW Static Shocker Mini Van de Graaff 

The device can use an empty aluminum can for the top electrode which works- but this $9 hollow steel sphere looks and works even better- I used the 80mm sphere: 
From eBay: BUY NOW Hollow Steel Sphere 

Van de Graaff Generator: this miniature electrostatic generator can create potentials of more than 50,000 volts allowing sparks to jump a couple centimeters through dry air. Similar physics to the sparks created when shoes scuff on carpet, a moving rubber dielectric belt carries electrons away from the top sphere leaving it positive charged- as can be seen by the electrostatic repulsion of some Mylar strands. A small battery powered 3V motor drives the belt via the bottom pulley in this unit that costs less than $10 US.?With appreciation to @educational_innovations for sending me this device! 


Stainless Steel Rattleback

This metal version is available here: 
From KJ Beckett: Metal Rattleback 

These acrylic versions work great and are inexpensive: 
From Educational Innovations: BUY NOW Rattlebacks 
From Amazon: BUY NOW Rattlebacks 

Stainless Steel Rattleback: prefers to spin counter clockwise. If spun clockwise, a complicated combination of friction, precession, and instability induced vibrations transforms the rotational energy into into rattling (energy of oscillations) and then into rotational energy in the opposite direction! This behavior is related to the asymmetric shape of the bottom of this kind of rattleback, it's somewhat propeller shaped with an "S" curve along the bottom ridge.

Radiometer in Arylic

Similar vintage items can often be found on eBay (a bit pricey though): 
From eBay: BUY NOW Radiometer in Acrylic 

Regular radiometers are available from these sources: 
From Educational Innovations: BUY NOW Radiometer 

A wide variety available here, including some nice blown glass displays: 
From Amazon: BUY NOW Radiometers 

Hundreds of options on eBay: 
From eBay: BUY NOW Radiometers

Radiometer in Arylic: kinetic energy from light in this Eames era vintage Lucite block sculpture with encased radiometer. Light heats up the "vanes" which then heat up the very thin gas left in the bulb- the black side of the vane is hotter than the colored side and any gas molecule that comes into contact with it flies off at a faster speed imparting impulse to the rotor.

Mega Tippe-Top

Here is the mega tippe-top compared to typical tippe-tops on the market and a US quarter dollar:

Limited quantities available from the Spinning Top and Yo-Yo Museum of Burlington, Wisconsin 

Educational Innovations has reasonably priced wood tippe-tops in their shop: 
From Educational Innovations: BUY NOW Tippe-Tops 
From Amazon: BUY NOW Tippe-Tops 

Mega Tippe-Top: spinning things often have surprising physics. This giant version of the famous flip-over top must be launched with a string pull to give it enough rotational energy to make the flip. It is also placed on a concave mirror to keep it from wandering too far. Friction with the mirror provides a torque that acts on the existing angular momentum of the top to flip it over. 


US Patriotic Radiometer

Radiometers are available from these sources: 
From Educational Innovations: BUY NOW Radiometer 

A wide variety available here, including some nice blown glass displays: 
From Amazon: BUY NOW Radiometers 

Hundreds of options on eBay: 
From eBay: BUY NOW Radiometers 

US Patriotic Radiometer: 4th of July physics toy on this 242th year since the the Declaration of Independence. Produced in the 1970s by Kyp-go (maker of Balafire bulbs) the images spin with kinetic energy converted from light. Light heats up the "vanes" which then heat up the very thin gas left in the bulb- the black side of the vane is hotter and any gas molecules that come into contact with it fly off at a faster speed imparting impulse to the rotor. Radiometers with special vanes like this are no longer in production but sometimes pop up for sale online as antiques.

In-Feed Google 3


Polarization Test Card

These inexpensive test cards are available here: 
From eBay: BUY NOW Polarization Test Cards

Get some polarizing filter sheets here: 
From Amazon: BUY NOW Polarizing Sheets 

Explore many aspects of polarization with this kit: 
From Educational Innovations: BUY NOW Polarizing Filter Demo Kit 

See this short introduction to linear polarizing filters on Hyperphysics, and many more details on polarization from Wikipedia

Polarization Test Card: light has features that are invisible to the human eye, such as the orientation of its electric field (denoted as polarization), but can be revealed to us by a polarizing filter, used to block light with specific polarization orientations. Inexpensive test cards like this are often found in shops selling polarized sunglasses. The molecular structure of plastics can rotate the polarization of any light that passes through, and this card has such thin layers added to the top of the photo to create the hidden silhouettes seen here. 

 

Pencil Hyperboloid

Choose your color and get one here: 
From Etsy: BUY NOW 
Hyperboloid Pencil Holder 


don't forget a set of pencils: 
From Amazon: BUY NOW 
Colored Pencil Sets 


Better yet- get some thermochromic color changing pencils! 
From Educational Innovations: BUY NOW 
Heat-Sensitive Pencils 

Pencil Hyperboloid: a perfect gift for any math teacher- the precisely oriented holes in this base direct 16 pencils to reveal a hyperboloid, the 3D surface traced by revolving a diagonal(skew) line, the outline of which is the conic section of the hyperbola. A doubly ruled surface for any desktop!

Memory Spring

Available here: 
From Mindsets: BUY NOW 
Memory Springs 

Affordable samples and kits here:
From Educational Innovations: BUY NOW: Energy Wire 

Similar produces featuring Nitinol Memory Wire: 
From Amazon: BUY NOW 
Nitinol Memory Wire Kits 

Memory Spring: some special alloys of brass can be made to have a shape memory triggered by temperature. These springs quickly change their length from 1 cm to 2.5cm when heated above 90 C (done here with hot water) and just as quickly shrink back to original size when cooled (immersed in cold water). Useful in many applications, especially things like automatic fire sprinkler valves and thermostats in car engines. This amazing property is related to a solid state phase transition similar to that of Nitinol wire called a Martensitic transformation.


Heat Pipe

The heat pipe kit includes the pipe and a copper rod: 
From Educational Innovations: BUY NOW Heat Pipe Demo Kit 

Get a heat pipe here (various sizes and shapes):
From Amazon: BUY NOW: Heat Pipe

Here is the liquid crystal sheet used in the video (range 20-25C): 
From Educational Innovations: BUY NOW liquid crystal thermometer sheet 

Heat Pipe: a device that transfers heat with great efficiency- as demonstrated by this fantastic kit from @educational_innovations . Here a liquid crystal goes from green (room temp) to black (near freezing) showing the heat transfer to a piece of ice through a heat pipe (top) and a similar sized piece of solid copper rod (bottom). As you can see the heat pipe cools much faster than the copper rod even though copper is an excellent conductor of heat. The heat pipe is a thin shell of copper that surrounds a tube of sponge like material filled with some water vapor and sealed with a low pressure inside. The heat is transferred from one end to the other by the phase transition of water- at the warm end water in the sponge evaporates into vapor absorbing heat energy, the vapor travels down the hollow core to the cold end where it condenses into liquid releasing heat energy. The water is wicked by the sponge to the warm end and the process repeats. Heat pipes like this one pull heat away from the CPUs in modern computers preventing them from melting. The amazing heat transfer ability is clearly felt in the fingertips if one places the copper rod and heat pipe into a glass of ice water-the heat pipe immediately gets cold! 

Reverse Cartesian Diver

Glass divers available here: 
From Amazon: BUY NOW Glass Divers 

The reverse diver needs a bottle with a oval shaped cross section. I used the bottle from this product- it has the right shape and size and the label comes off easily: 
 
From Amazon: BUY NOW Oval Shaped Bottle Source 

Inexpensive and fun diver kits available here: 
From Educational Innovations: BUY NOW Cartesian Diver Kits 

Wikipedia has the details on the Cartesian diver (and reverse diver)

Reverse Cartesian Diver: physics puzzle (swipe for hint). On the left is a Cartesian diver- pressing on the bottle forces water into the glass diver, which then compresses the bubble in diver’s head allowing it to sink. On the right is a reverse Cartesian diver- again the bottle is pinched but this time the diver ascends- why? 

Magneview Flim

Get some magnetic viewing film here: 
From Educational Innovations: BUY NOW Magnetic Viewing Film 

Magneview Flim: making the invisible visible and revealing the hidden physics of our everyday world. Microscopic cavities in this green film are filled with oil and tiny flakes of Nickel metal- like compass needles, the flakes align with the magnetic fields revealing the complexity of the north and south pole domains of these magnets. Two of the disk magnets have multiple north and south poles and look like gears with teeth- these are rotors from small motors. 


Ice Melt Demo

Get this similar demonstration kit here:
From Educational Innovations: BUY NOW
Ice Blocks Melt Demo

Ice Melt Demonstration: Wood or Aluminum- which will melt the ice fastest and why? Both blocks start at the same temperature (room temp) and have the same shape and volume. Swipe to reveal result shown in real time (not sped up!) Hint: Although both blocks are at the same temperature, the aluminum feels cool to the touch and the wood block feels warm. Those who have taken basic physics should have an advantage on this question- one block is an excellent insulator and the other a conductor.

Tea Candle Steam Engine

Get one from these fine sources: 
From Educational Innovations: BUY NOW Tea Candle Steam Engine 
From Amazon: BUY NOW Tea Candle Steam Engine 

Other interesting engines available here: Simple Heat Engines

Tea Candle Steam Engine: a functional piston steam engine complete with boiler and flywheel. Takes about 2 minutes to get going after the candle is lit. The invention that powered the industrial revolution on a desktop! Made by Wilesco. 

Pop Pop Boat

Get one here: 
From Educational Innovations: BUY NOW Pop-Pop Boat 
From Amazon: BUY NOW Pop-Pop Boats 

Wikipedia has the details on the physics and history of this little steamboat toy 

Pop-Pop Boat: birthday candle powered, super simple steam engine named after the sound it makes when operating. The engine is just a metal box, heated by the candle, with two pipes coming out of it. Steam builds up pushing water out with an explosive pop- which then creates a vacuum sucking more water in to repeat the process. Patented in 1915 these were very popular in the 1940's.