Educational Innovations

Tiny Tippe Top

Available from this shop in Germany: 
From experimentis-shop.de: BUY NOW Tiny Tippie-Top 

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

From Amazon: BUY NOW Tippe-Tops 

Tiny Tippe-Top: spinning things often have surprising physics! The smallest functioning version of the famous flip-over top I've ever seen. Friction with the mirror provides a torque that acts on the existing angular momentum of the top to flip it over. The top will stay flipped until the spin rate slows down enough to where its center of mass pulls it back to the resting position. 

Mini-Toroflux

There are many affordable versions of this device: 
From Educational Innovations: BUY NOW Flow Ring 

The original version is available here: 
From Amazon: BUY NOW Toroflux 

Get one and flow with it! 
From Art of Play: BUY NOW 
The Toroflux


Why does it look like a bubble when moving fast? Wikipedia has the details: when the object exceeds a certain speed the flicker fusion frequency of our vision produces the bubble illusion. 

The physics of the toroflux is wonderfully illustrated and explained in this article by Daniel Walsh. 

Mini-Toroflux: kinetic art toy made from a single continuous loop of stainless steel band. The band of spring metal is woven such that it forms a torus that can clamp on to and roll down a stick or in this case s segment of cord. This miniature version loops through itself nine times which requires the spring ribbon to twist creating a tension such that when released the spring will pop into its minimum energy state- a flower-like torus. Amazing combination of math and kinetic art invented by Jochen Valett. Thanks to Tim Rowett for sending me this rare mini version for my collection.

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.


Mirascope

Similar devices available here:
From Educational Innovations: BUY NOW Mirascope 
From Amazon: BUY NOW Mirascope 
 

Mirascope: two parabolic mirrors create a 3D image above the actual object. A repost of one of my favorite physics toys ever. The image of the dice made here is not a hologram and is produced solely by reflection of light rays between special concave mirrors. Discovered circa 1969 by Landry and Elings at UC Santa Barbara.

Simple Polariscope

This kit has everything needed to make your own polariscope: 
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! 

Simple Polariscope: polarized light reveals the hidden rainbows due to internal stresses imposed on polymer materials such as these pieces of polystyrene flatware, a technique used to model stress distribution patterns in engineering. Place the polymer samples between two linear polarizer filters and the internal stresses created by the molding process during manufacturing produce colors through birefringence due to photoelasticity.

Revolution

This vintage toy can sometimes be found on eBay. 
Quality models of the modern version of this physics toy are still available 
From Educational Innovations: BUY NOW Magnetic Levitator 
From Amazon: BUY NOW Magnetic Levitator 

Revolution: vintage 2D magnetic levitation- permanent magnets can only produce static equilibrium along two dimensions- here a glass mirror constrains the third dimension, and makes for a nice bearing surface for rotation. This item was sold in the 1990s in mall shops such as Natural Wonders. 


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. 

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? 

Birefringence in Calcite

Get a sample here: 
From Amazon: BUY NOW Optical Calcite Crystal 
From eBay: BUY NOW Optical Calcite Crystal 

Get inexpensive polarizing filters here: 
From Educational Innovations: BUY NOW Polarizing Filter Sheets

Birefringence in Calcite: the speed of light in a calcite crystal depends on polarization- the refractive index is different depending on the polarization orientation of the light transmitted through it. As a polarizing filter is rotated 90 degrees, one image appears and the other vanishes, showing that the polarization orientation of the light of the two images is indeed perpendicular. In addition the elegant rhombohedral nature of calcite crystals is obvious in this sample. 


Iron Filings in Silicone Oil Suspension

Available from these fine sources: 

From Amazon: BUY NOW Magnetic Field Viewer Set (get the demo set)

Similar device here:
From Educational Innovations: BUY NOW Magnetic Field Viewer with Magnet 

Iron Filings in Silicone Oil Suspension ( Iron filing field detector ): visualizing the invisible- the magnetic field lines around a horseshoe magnet. In the presence of a magnetic field, ferromagnetic materials (such as iron) temporarily become magnets. Here the iron filings become dipole magnets and link up and align like tiny compass needles to follow and reveal the magnetic field lines associated with the permanent magnet underneath. Viscous silicone oil temporarily keeps the iron particles suspended yet allows for rotation and repositioning under the influence of the magnetic field.

 

Polarizing Filter Black Wall Illusion

Amazon lists acrylic tubing at a reasonable price: get a 2 foot long tube with an inner diameter of 1.5 inches for about $17 US. This will accommodate a large marble for the demonstration. 
From Amazon: BUY NOW Acrylic Tubing 

For a 1.5 inch inner diameter (3.8 cm) tube you will need a 10 inch (25.4 cm) wide sheet to complete a cylinder inside the tube. 
From Educational Innovations: BUY NOW Polarizing Film

Polarizing Filter Black Wall Illusion: two sheets of polarizing film (with polarization axes oriented at 90 degrees to each other) create this illusion inside an acrylic tube. Physics magic!

Fluorescent Ooze Tube with 405nm Laser

Click these links for ooze tube sources (green works best).
From Educational Innovations: BUY NOW 
Ooze Tube 

From Amazon: BUY NOW 
Ooze Tube 

Get an inexpensive 405nm laser pointer here: 
From Amazon: BUY NOW 
(405 nm) Laser pointer 

Fluorescent Ooze Tube with Laser: stunning visual effects from a 405 nm laser pointer interacting with the viscous polyisobutene fluid in this ooze tube timer toy. The fluorescent dye converts this particular laser light frequncy to green light as the fluid stretches into thin ropes that act as light pipes while bubbles reflect and fan the beam. Perhaps the next generation Lava Lamp? 

 


How a Slinky Falls

Get the classic here: 
From Amazon: BUY NOW Mini Slinky 

Get a giant version of the slinky here! 
From Educational Innovations: BUY NOW Giant Slinky: Super Wave Spring 

How a Slinky Falls: amazing physics demonstration with this classic toy. The center of mass of the slinky spring falls with an acceleration of g- note in this slow motion video that the bottom of the slinky does not move until the spring is fully collapsed. Hooke's law plus gravity! 

Viewing the Feel Flux Magnetic Field

Get this device here: 
From feelflux.com: BUY NOW Feel Flux 

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

From Amazon: BUY NOW Magnetic Viewing Film

Viewing the Feel Flux Magnetic Field: Magneview film reveals the powerful field of the neodymium magnet as it falls with terminal velocity through the copper tube of the Feel Flux toy.

Spring/Latch Polymagnets

Avilable here: 
From Polymagnet.com: BUY NOW 
Spring/Latch Pair Demo 


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

From Amazon: BUY NOW 
Magnetic Viewing Film 

Spring Latch Polymagnets: this pair of coded magnets attract but don’t touch in a state of stable equilibrium at a distance of 1/2 cm- but if one magnet is turned a half twist they latch together. Magnetic viewing film reveals the specific and complex arrangement of N and S poles that allow for this set to act like a spring or a latch (although only if constrained to an axis along their centers). 


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. 

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. 

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.