Educational Innovations

Super Absorbent Polymer

Get some of these grow-spheres here: 
From Educational Innovations: BUY NOW Growing Spheres 

Super Absorbent Polymer: poly-acrylamide polymer crystals are able to absorb up to 200 times their volume of water. Here seven small spheres, approximately 4mm in diameter, were immersed in water for three hours, after which they were slightly more than 23mm across. The final gel sphere is more than 99.5% water- and they bounce! 

Nitinol Memory Wire

Get a sample from these sources: 
From Ebay: BUY NOW Nitinol Memory Wire shape sample 
From Educational Innovations: BUY NOW Nitinol Memory Wire Spring 

Nitinol Memory Wire: this alloy of nickel and titanium can be trained to a specific shape at high temperature- then bend it up at room temperature and it will snap back into shape when exposed to moderate heat such as hot tea water. This remarkable property is a type of solid state reversible phase transition known as a martensitic transformation. 
 

Exothermic Crystallization Heat Pack

Available in many sizes and colors: 
From Educational Innovations: BUY NOW Click Activated Resuable Heat Pack 
From Amazon: BUY NOW Click Activated Reusable Heat Pack 

Exothermic Crystallization Heat Pack: real-time instant crystallization of a supercooled solution. Solid sodium acetate melts at 137F (58C), but it will stay in liquid form as it cools to room temperature creating a supersaturated and supercooled state- the solution stays in the liquid form until a seed crystal, provided by clicking the metal disk, initiates the solidification. The resulting white crystal is actually quite hot; solid states have lower energy than liquid states and thus the difference in energy is given up as heat that raises the temperature back up to the melting temp, and you can see in the few seconds of the video that the temperature rises from 26C to 34C. This pack is reusable many times- just boil the pack until all the crystal is melted to reset. 


Drinking Bird Heat Engine

Get this famous physics toy from these sources: 
From Educational Innovations: BUY NOW 
Drinking Bird Engine 

From Amazon: BUY NOW 
Drinking Bird Engine 


Wikipedia has wonderful details about the rich history (and further descriptions of the operational principals) of the Drinking Bird
Drinking Bird Heat Engine: time lapse of 15 minutes into 15 seconds (4 cycles). Cooling by evaporation at the head leads to lower pressure in the top bulb, the dichloromethane fluid rises up the neck making the bird top heavy and the bird tips over dipping its beak and letting the fluid return to the bottom bulb. The time lapse allows a clearer picture of how the fluid rises, shifting the center of mass, and how tipping makes the glass column lift out of the fluid in the bottom allowing the pressure to equalize and letting gravity pull the fluid to return to the base. Process repeats as long as the top stays wet. So much physics in one hypnotic toy!

Hand Boiler

A variety of shapes and colors are available 
From Educational Innovations: BUY NOW 
Hand Boilers 

From Amazon: BUY NOW 
Hand Boilers 

Hand Boiler: liquid-gas phase transition. The boiling point of dichloromethane is slightly below body temperature - heat from a hand increases pressure in the bottom bulb pushing the purple (dyed) liquid through the glass pipe to the top.

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. ‚ú®With sincere appreciation to Tim Rowett for this kind gift. 

In-Feed Google 2

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. 

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.

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. 

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).