This magnetic version fo Newton's cradle is no longer in production, but somtimes found on ebay:
From eBay: Search NOW: Magnetic Newon's Cradle
Here are some nice versions of the classic Newton's Cradle
and here is a nice Magnetic Replusion Demonstration
Magnetic Newton's Cradle: the famous collision demonstration reimagined with opposing magnets as the pendulum weights- shown here in two modes of operation. Initially the collision pattern looks similar to the traditional colliding spheres version but quickly goes chaotic- the magnetic field of each weight interacts with all the other magnets simultaneously making the system nonlinear. A 1990s desk toy by Fascinations- sadly no longer in production.
If you want to make one of these you will need:
1) some pyrolytic graphite (which can easily be sliced and carved):
From eBay: BUY NOW Pyrolytic Graphite
2) some neodymium magnets: the racetrack magnets are a bit pricey though!
From eBay: BUY NOW Diamagnetic Levitation Kit
3) shrink and print this image on medium weight paper,
and 4) cut and assemble!
Micro-Hoverboard: diamagnetic levitation technology- although Marty McFly would have to be three inches tall to ride this hoverboard. Made from printed paper and pyrolytic graphite with concentric circular neodymium magnet array. The magnetic rings alternate between north and south magnetic poles in just the right way to trap this special type of graphite. Pyrolytic graphite has strong diamagnetic properties such that it develops an opposite (but weak)magnetic field when in the presence of a magnetic field from another source. Swipe to see the graphite pieces levitating individually.
Get these 99.9% pure element Bi 83 cubes here:
From Luciteria: BUY NOW: Bismuth Element Cube
Many combinations of strong neodymium magnets will work, here are the versions I used:
From Amazon: BUY NOW: Cylindrical Neodymium Magnet
From eBay: BUY NOW: Tiny Neodymium Cube Magnets
See my video of other pure element cubes by Luciteria Science
Bismuth Diamagnetic Levitation: Element 83 (bismuth) is the most diamagnetic of the elements*. Here a small neodymium magnet is made to float between two 99% pure bismuth 10mm cubes which are held in precise configuration by friction with the parallel walls of the acrylic assembly I made. Diamagnetic substances only have magnetic fields of their own when placed in an external magnetic field from another source- here the tiny cube magnet supplies the field. Diamagnetic fields are pretty weak though so a powerful cylindrical neodymium magnet sits above the cubes and is adjusted to help lift the tiny cube magnet against gravity. *except for a special form of carbon known as pyrolytic graphite.
Similar device available here:
From Amazon: BUY NOW: Gauss Gun
Easy to make with these magnets:
From eBay: BUY NOW Magnets for Magnetic Cannon DIY and Steel balls for Magnetic Cannon DIY
Gauss Gun: acceleration of steel balls through magnetic potential energy and cascading collisions. Four neodymium magnets provide the potential energy that is converted into significant kinetic energy of the end steel ball. The initial configuration has two steel balls on one side of each magnet- an incoming ball on the opposite side accelerates and impacts each magnet in turn sending each loosely connected second ball off with greater speed.
This unique toy only available here:
From safetynailer.com: BUY NOW: Newton's Spindle
Follow this link for a regular Newton's Yo-Yo
Newton's Spindle: the latest innovation- a quite clacker (lol!) which uses neodymium magnets as the swinging weights. The weights still collide but without making physical contact via magnetic repulsion, yet the exchange of momentum is just like that of a regular Newton’s yo-yo. Newton's 3rd Law states that action force equals opposite reaction force- here the red and blue weights (embedded magnets) are equal in mass, so the forces of each collision provide accelerations that are equal and opposite such that the deceleration of the incoming sphere is equal to the acceleration of the outgoing sphere and the spheres trade places leaving one always at rest.