Lenz's Law
Get a similar kit here:
From Amazon: BUY NOW Eddy Current tubes
Get some magnetic viewing film here:
From Educational Innovations: BUY NOW Magnetic Viewing Film
Lenz's Law: a strong neodymium magnet falls slowly down a copper bus bar as though passing through a viscous liquid. Since magnetic fields pass through copper, magneview film reveals the location of the falling dipole magnet. Moving magnetic fields from the falling magnet produce electric currents in the copper. These currents then produce magnetic fields that have the opposite polarity to the initial field. So a falling magnet makes the copper pipe briefly into an electromagnet that repels the magnet. The rectangular copper “pipe” is from a water-cooled electromagnet power supply line, 1.5 x 2 in (4 x 5 cm) in cross-section, designed to supply a steady DC current of 5000 amps. This 40cm long piece weighs in at 6kg and has a 1.5cm diameter hole for cooling water to flow down its center. From a decommissioned particle accelerator magnet.
Jitter Gyro Ring
Available in "pro" metal version and colored rings version:
From Educational Innovations: BUY NOW Jitter Gyro Ring
From eBay: BUY NOW Color Jitter Gyro Ring
Jitter Gyro Ring: a 1990s skill toy craze out of New Zealand that features small rings that "roll" down a thicker steel ring and making a characteristic chattering sound as they go. Swiping the small rings gets them spinning and gives them angular momentum. Centripetal acceleration then keeps the inside of the small rings in contact with the steel ring so that they roll around as they descend (seen here in 240fps slow motion). The challenge is to rotate the large ring fast enough to keep the small rings in motion.
Diamagnetic Trap Sculpture
This particular sculpture is no longer available, however, Educational Innovations has this nice and affordable starter kit:
From Educational Innovations: BUY NOW Diamagnetic Levitation Kit
Dramatic diamagnetic levitation kits are available here: the racetrack magnets are a bit pricey though!
From eBay: BUY NOW Diamagnetic Levitation Kit
Diamagnetic Trap Sculpture: a thin disk of pyrolytic graphite hovers and spins in stable equilibrium over a bullseye configuration of magnetic poles. Diamagnetic substances become temporary magnets while immersed in an external magnetic field, and the created diamagnetic field always opposes the external field (in contrast to ferromagnetic substances like iron which attract). Graphite of this type is one of the strongest diamagnets known, and will levitate over a powerful array of neodymium magnets. ✨With sincere appreciation to Tim Rowett for this kind gift.
Plasma Globe
Plasma globes are now available in many sizes and levels of quality. Here is a source for reasonably priced quality globes:
From Educational Innovations: BUY NOW Plasma Globe
From Amazon: BUY NOW Plasma Globes
Plasma Globe: low pressure noble gasses exhibit glow discharge from high voltage, creating plasma filaments that rise upward due to heating- shown here in slow motion. A small high frequency coil at center creates the high voltage potential between the center electrode and the metal coated glass globe. Current flow through the thin gas produces the colorful emission spectra from the gasses
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.
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.
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.
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.
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.
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.
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.