These micro racer cars are sold under many brand names, and most come with a clear sphere to demonstrate this centipetal accelration phyenomenon.
From Amazon: BUY NOW: Micro Racer + Sphere
Micro Racer in a Glass: This tiny battery powered car overcomes gravity through centripetal acceleration and slight friction with the glass surface. With sufficient velocity the surface normal force supplies the centripetal acceleration. The car’s battery last for many minutes and is USB rechargeable.
For the price of a vinyl LP you can own the amazing artwork of Tristan Duke. This album by Jack White is damn good as well (I also got the digital download with the vinyl purchase).
From Amazon: BUY NOW Jack White Lazaretto (Vinyl)
Specular Hologram on Vinyl: the album Lazaretto by Jack White features this amazing "scratch hologram" of a twirling angel (shown here accompanied by the opening bars from the title track of the album). The hologram was hand etched on the metal master by artist Tristan Duke of Infinity Light Science. The etched grooves reflect a point source of light as sharp glints and the groves are arranged so that each eye sees a slightly different pattern such that, via stereopsis, the shiny points appear to float above or below the surface. This album has a lot of other interesting features including dual grooves that allows for two different intros to one track (depending on where the needled is dropped) and side A plays from the inside out- fun!
From Kainen and Wollard:
From Amazon: BUY NOW Dinosaur: Photicular Book
Photicular Dinosaur Book: the latest in the photicular series- this time with scientific reconstructions of ancient beasts! This amazing book of 8 astonishing moving and looping lenticular images is the creation of photographer/artist/inventor Dan Kainen where the moving images use Kainen's patented process where a specially processed image slides under a thin film of lenticular lenses. Kainen has teamed up this time with Kathy Willard who puts each image into context incorporating fun paleontology facts appropriate for kids yet informative to all.
Penultimate: magnetic levitation pen. A two dimensional magnetic trap suspends a ball point pen- in this design the point of the pen against a polished acrylic acts as a bearing to let the pen spin with minimal friction.
Whee-Lo: the original version of this toy from the '60s- physics of: angular momentum, magnets, rotational and translational kinetic energy, phase locking, it's all there. Who else had one of these?
Pluto Globe by MOVA: simulate the historic 2015 Pluto flyby of NASA’s New Horizons space probe with this self rotating detailed image of the dwarf planet’s surface. Each MOVA rotating globe is sealed within a clear liquid filled acrylic sphere. The rotation is powered by light that shines through the semi-transparent Pluto globe on to solar cells inside the globe which drive a motor. But what does the motor push against to maintain the rotation? Believe it or not it uses magnets to push against the Earth's magnetic field like a compass needle. Love this clever device. With thanks to @movaglobes for sending me this amazing globe.
Get a set here!
From Amazon: BUY NOW Buzzing Magnet Set
Rattlesnake Eggs: polished barium- strontium ferrite ceramic magnets influence each other when many centimeters apart. Turn sound on--Wait for it! Sold as "buzzers" these magnets come together with multiple bounces creating a characteristic zipper sound. Most shops and online vendors incorrectly label these as hematite- a completely different substance that does not magnetize well.
Light Pipe: internal reflection constrains most of the laser light to propagate along the bent acrylic rod- the physics of fiber optics. This plastic stand is sold as a hanging ornament display- repurposed here as a great light-pipe demonstration.
Available on eBay (2 current to this post)
From eBay: BUY NOW Vintage Swirl Around Top
Swirl Around Top: the magnetic tipped top stays on the perimeter of the steel plate template- but since the top has more mass than the triangular plate, the triangle moves in an interesting way. This kinetic art toy takes advantage of Newton's 3rd law and rotational kinetic energy. Produced by The Toycrafter in the 1990s these tops are out of production but can often be found on eBay.
From eBay: BUY NOW MicroBank Coin Illusion
MicroBank: coin shrinking bank- clever use of symmetry, mirrors, and a concave Fresnel lens combine to create this illusion. Magic with physics!
Get one here:
From Amazon: BUY NOW Helicone Interactive Kinetic
This manipulable kinetic art available here:
From Art of Play: BUY NOW
The Helicone: an interactive kinetic sculpture designed by @john.edmark and distributed by playableArt. With a bit of practice I finally mastered the transformation in both directions: A snap of the wrist imparts angular momentum to the laser cut wood petals which then rotate until an internal mechanism stops their motion with predetermined spacing- a helix transforms to an abstract pine cone. A second snap of the wrist in the opposite direction returns the helix.
Get the levitating/rotating platform here:
From Amazon: BUY NOW Levitron Revolution
From eBay: BUY NOW Levitron Maglev Platform
Versions of the floating rings illusion can be found at the Exploratorium, at the Carnegie Science Center,
and is also famously featured in the 1981 Superman movie:
Levitron Revolution: well engineered control system uses an adjustable electromagnet and and a Hall effect sensor to levitate an 8cm diameter neodymium magnet platform 5 cm in mid-air. The feedback loop allows fine tuning of the magnetic field to exactly balance the pull of gravity. The platform also rotates, perfect for this floating rings illusion sculpture I constructed.
Available from the US Post Office and here:
From Amazon: BUY NOW Thermochromic Eclipse Stamps
Thermocromic Eclipse Postage Stamps: In commemoration of the total solar eclipse next Monday the US Post Office has released their first ever stamp featuring thermocromic ink. Thermotropic liquid crystals go from opaque to transparent during a phase change from a crystal to liquid state. Here the warmth of the hand reveals the face of the moon in front of the solar corona. The first physics toy stamp!
Get a MaBoRun here:
From Amazon: BUY NOW MaBoRun Mini Marble Run
MaBoRun Mini III: rolling marbles doing tricks as potential energy of gravity is converted to kinetic energy. In this mini-marble run a battery powered scissor linkage translates the rotation of the motor into linear motion to lift the marbles to the top.
From Amazon: BUY NOW Daruma Otoshi Toy
Daruma Otoshi (Dropping Priest): Traditional Japanese physics toy. Use the hammer to knock out pieces, but without tipping over the stack. Newton's 1st Law as seen in slow motion- a mass at rest tends to stay at rest.