Magnetic Toys

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.

Magnetic Flux Gyroscope Pendant

Magnetic Flux Pendants and other amazing science inspired jewelry available here:

From Foxtail Jewelry: BUY NOW: Kinetic Magnetic Pendants

Magnetic Flux Gyroscope Pendant: two neodymium magnets on chains remain suspended by their mutual magnetic attraction. This kinetic art necklace design is from a new line of physics inspired jewelry- a collaboration with designer and artist Betsy Yates of @foxtailjewelry who so masterfully brought this concept to life and is currently featuring @physicsfun inspired pendants in her gallery and store. 

Golden Ferrofluid

Available on Etsy: BUY NOW Gold Ferrofluid Cell 

Golden Ferrofluid: colloidal ferromagnetic liquid in a specially prepared water-alcohol suspension. Curious behavior results from the interplay between magnetic force and surface tension. I'm still investigating the gold coloring and the specific makeup of the clear suspension fluid- both trade secrets it seems. The gold color appears to be a thin coating at the boundary between the ferrofluid and the suspension liquid.


Electric Motor/Generator

Amazingly this motor is available for less than $10 US. 

From Amazon: BUY NOW: Brushless Motor/Generator with LED

Electric Motor/Generator: this inexpensive and common motor can also serve as a generator of AC electricity- here lightning an LED when the shaft of the rotor is spun by hand. Most electrical energy we use today is produced by moving a magnet near a coil of wire (known as Faraday’s law of induction) to produce an electric current. Removing the permanent magnet casing reveals this design to use 9 separate copper windings. I made a transparent second rotor with six neodymium magnets- and when these magnets are made to move near the windings the LED again lights with the flow of current. Swipe to see the beautiful magnetic field pattern of the rotor design using magneview film.

Colored Ferrofluid Display Cells

Available on Etsy: BUY NOW Motion Ferrofluid Sculpture 

Colored Ferrofluid Display Cells: spectacular metallic blue, gold, and black display cells by czferro - colloidal ferromagnetic liquids in a specially prepared water-alcohol suspension. Curious behavior results from the interplay between magnetic force and surface tension. The gold and blue coloring appears to be from a thin coating at the boundary between the ferrofluid and the suspension liquid. Still exploring the details of the coloring and the specific makeup of the clear suspension fluid - both trade secrets it seems. 


Chaotic Decision Pendulum

Get this device here:

From eBay: BUY NOW: Chaotic Decision-Aider Pendulum

From Amazon: BUY NOW: Chaotic Decision-Aider Pendulum

Chaotic Decision Maker Pendulum: adding magnetic forces to gravity gives this comical pointing pendulum chaotic motion- not random, but very sensitive to slight differences in initial launch conditions. Each “choice” has a dipole magnet underneath which attracts a magnet in the hand and locks the pointer into place, but only after enough kinetic has been dissipated, and until that final state is obtained the motion is chaotic. Fun physics behind this novelty gag gift.

Toy Car with Magnetic Suspension Wheels

Available from these shops in Germany: 
From experimentis-shop.de: BUY NOW 
Mabrino Car 

From mabro.com: BUY NOW 
Mabrino Car 


Similar toys available here: 
From Amazon: BUY NOW 
Tegu Car Sets

Toy Car with Magnetic Suspension Wheels: Simple block car with clever wheel design. Small neodymium magnets embedded in the block lock on to steel balls, which raise the vehicle and become free to rotate providing the wheels for this simple toy.

Electric Motor Build

Get an easy to assemble kit here (or just buy the replacement wire to build your own like in the video): 
From Educational Innovations: BUY NOW Simplest Motor Kit 

Electric Motor Build: One of the most important inventions consists of only three basic components as shown here: coil, magnet, and a battery with lead wire posts. The wire of the spinning coil has an insulating coating on it- and this coating is carefully scrapped off one side of the thin wire on each end. When current passes through the coil it becomes an electromagnet and the permanent magnet repels it making it spin- as it turns the current goes on and off depending on if the copper wire posts are in contact with the bare wire side (current on) or the part of the wire with the insulating coating intact (current off). When the current is off momentum keeps the rotation going until the next push. The physics of converting electric energy to rotational kinetic energy- and a fun DIY project! 


Bismuth Diamagnetic Trap Levitation

See more of Ernie's amazing creations here in his Etsy shop Element83 
From Etsy: BUY NOW Magnetic Levitation Sculptures

From Etsy: BUY NOW: Bismuth Maglev Rod

Bismuth Diamagnetic Trap Levitation: neodymium cube magnet trapped between two pieces of strongly diamagnetic bismuth crystal. Diamagnetic substances only have magnetic fields of their own when placed in an external magnetic field from another source- here the cube shaped magnet supplies the field. Diamagnetic fields are pretty weak though so two large ceramic magnets are placed on each side and adjusted to help lift the cube magnet against gravity. Trapped in equilibrium by these magnetic fields, the slightest air currents can send the cube magnet dancing. Swipe to see a vertical trap based on the same physics. More amazing creations by Ernie McElhannon.

Top Secret

This physics toy top is available here: 

From Amazon: BUY NOW Mystery Spinning Top

From eBay: BUY NOW Mystery Spinning Top 


The amazing green magnetic viewing film is also available: 
From Educational Innovations: BUY NOW Magnetic Field Viewing Film 

Here is the 1974 patent showing the very simple circuit of this device. The spinning dipole (the top itself) induces a current in one of the coils, and this current is fed to the base of the transistor turning the electromagnet on when the top is near. 
 

"Top Secret": this top will stay spinning for more than a week- because it is actually a motor! The top is a dipole magnet (as revealed by Magneview film) and the base has an electromagnet that gives the dipole a push when the top comes near the center. An ingeniously simple circuit consisting of only a battery, a coil, and a transistor, is activated when the spinning magnet nears the coil turning on the electromagnet to give a boost to the spin of the magnetic top.

The Alchemist

Bismuth levitation available here: 
From Etsy- Element 83: BUY NOW Magnetic Levitation Sculptures 
featuring amazing Bismuth Crystals, Jewelry, and Maglev Kinetic Art

Circa 1981, Physicists transmute Bismuth to Gold: Particle accelerators make possible the ancient alchemist’s dream—but at a steep cost 

The Alchemist: cast from diamagnetic Bismuth, a neodymium cube magnet levitates trapped between the hands of the ancient scholar. Diamagnetic substances only have magnetic fields of their own when placed in an external magnetic field from another source- here the cube shaped magnet supplies the field. Diamagnetic fields are pretty weak though so a cylindrical neodymium magnet hangs above the figure and is adjusted to help lift the cube magnet against gravity. Trapped in equilibrium by these magnetic fields, the slightest air currents can send the cube magnet dancing. Although alchemists never succeeded in transmuting lead to gold, in 1981 physicists used the particle accelerator at Berkeley to shoot Carbon nuclei at thin foils of Bismuth- the resulting collisions did produced a tiny amount of Gold atoms! So modern nuclear physics, applied to the element Bismuth, finally accomplished the aspirations of the alchemists. ?Another amazing creation by Ernie McElhannon. 


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.

 

Gravity Defying Nail and Magnet

Neodymium magnets will produce the largest gap when suspending a nail.
Please use exterme caution when handling these magnets. 

From Amazon: BUY NOW: Neodymium Super Magnet

Magnetic Defiance of Gravity: a nail suspended between a chain and a powerful neodymium magnet. Ferromagnetic attraction over a distance of many millimeters, and a reminder of the presence of the typically invisible electromagnetic forces all around us. Make your own with a paperclip, string, and a refrigerator magnet- or get a neodymium magnet and see how massive an object you can suspend in air. 

Newton's Spindle

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 quiet 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 mass is equal to the acceleration of the outgoing mass and the masses trade places leaving one always at rest. 


Bismuth Maglev Rod

Get this amazing and affordable science sculptue here:

From Etsy: BUY NOW: Bismuth Maglev Rod

Click here to see other diamagnetic toys and scuptures 

Bismuth Maglev Rod: Small magnets are trapped, suspended and floating, within the notch of a rod cast from the diamagnetic metal bismuth. Diamagnetic substances only have magnetic fields of their own when placed in an external magnetic field from another source- here the small floating magnet supplies the external field. Diamagnetic fields are pretty weak though, so a powerful neodymium magnet sits above the gap on the top of the rod, and its height is adjusted to help lift the small magnet against gravity. Another amazing creation by Ernie McElhannon of Element83.

Electric Generator Demonstator

Get this demonstation here: 
From EngineDIY: BUY NOW: Electric Generator

I upgraded this version with a larger LED light bulb: 
From Amazon: BUY NOW: 3V LED lightbulbs and E26 Socket

Generator Teaching Demo: The electrical energy that comes to your home is produced by some device somewhere moving a coil of wire next to a magnet to produce an electric current (known as Faraday’s law of induction). This tabletop demonstration uses a crank and belt drive to spin the coil between the north and south poles. The ends of the coil are attached to the two smooth metal pieces on the shaft (the commutator) that makes contact with the output wires and connects to the lightbulb. Maximum current is produced when the axis of the coil is at a right angle to the magnetic field- so the current comes in a series of pulses and the bulb flashes on and off. Physics of energy transfer: mechanical kinetic energy→ electrical energy→ light energy.