Magnetic Toys

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.

Feel Flux Loop

Available as a set, or individually (all come with the super powerful sphere magnet) here:

From feelflux.com: BUY NOW: Copper + Aluminum Feel Flux

Get some magnetic viewing film here: 
From Educational Innovations: BUY NOW Magnetic Viewing Film 
From Amazon: BUY NOW Magnetic Viewing Film 

Feel Flux Loop: original (copper) and the "Skill Flux" version (aluminum)- toys that use Lenz's Law to manipulate a very strong neodymium magnet. A changing magnetic field (such as that from a falling magnet) induces an electric current in the copper, which in turn produce an electromagnetic field (but of lesser strength) with opposing polarity. Interestingly the magnet falls a bit faster through the aluminum even though the walls are thicker- Al is only about 60% as conductive as Cu- so it takes more material to induce the needed magnetic field using aluminum. Interestingly the Al tube is about half the mass of the Cu one, even though it is larger in volume. Swipe to see the effect via magneview film which allows a visualization of the magnetic field- note that the field extends and is visible right through the thick copper.

Dipole Magnet and Iron Filings

Get this set here: 
From Amazon: BUY NOW 
Magnetic Viewing Cylinder

Dipole Magnet and Iron Filings: visualizing the invisible- the magnetic field lines around a dipole 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 end to end to follow and reveal the magnetic field lines associated with the permanent magnet within the hollow tube. 


Rattlesnake Eggs

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. 

In-Feed Google

Bismuth Diamagnetic Trap Levitation

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

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. Another amazing creation by Ernie McElhannon.


Feel Flux

Get one here: 
From feelflux.com: BUY NOW Feel Flux 

Feel Flux: a toy utilizing Lenz's Law- a very strong neodymium magnet falls slowly down a copper tube as though passing through a viscous liquid. Moving magnetic fields produce electric currents in a conductor (such as copper). These currents then produce magnetic fields that have the opposite polarity to the initial field. So a falling magnet makes the copper tube briefly into an electromagnet that repels the magnet.

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. 


In-Feed Google 2

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 eBay: BUY NOW 
Tegu Cars 

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.

spYke Ferrofluid Display Cell

Check out the Etsy page of CZFerro: imaginative and quality ferrofluid display cells 
On Etsy: BUY NOW Magnetic Fluid Sculptures 

spYke Ferrofluid Display Cell: another spectacular display cell by czferro featuring a colloidal ferromagnetic liquid in a specially prepared water-alcohol suspension. The orange background highlights the curious spiking behavior of the black ferrofluid- a result of the interplay between magnetic force and surface tension between the liquids. 


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.

Buda Ball

Only available from the Flyte team:

From Flytestore.com: Buda Ball 

See also: The Story Clock

Buda Ball: a spherical magnet hovers 1.5 centimeters from the surface of a magnetic pinning system within a hardwood base. This kind of levitation uses a control system with adjustable electromagnet coils in a feedback loop with Hall effect sensors which allow for fine tuning of a magnetic field to precisely balance the pull of gravity- even when the base is in a vertical orientation! Amazing magnetic levitation physics demonstrated with aesthetic design (and very clever engineering) by the flyte.se team.

Ferrofluid Interactive Lava Lamp

Available here:
From Etsy: BUY NOW Ferrofluid Lava Lamp

Ferrofluid Interactive Lava Lamp: special ferrofluid infused wax allows manipulation of the blobs of “lava” with a weak magnet, adding an interactive element to the already mesmerizing physics of convective heat flow, Archimedes principle, and immiscible liquids. Love the atomic rocket theme on this updated version of the 1960s classic physics toy. 


Electric Motor

Get this easy to assemble kit here: 
From Educational Innovations: BUY NOW Simplest Motor Kit 

Electric Motor: in its simplest form!- coil, magnet, and battery. The wire of the coil has an insulating coating- and this coating is carefully scrapped off one side 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 currents goes on and off depending if the copper posts are in contact with the bare wire (current on) or the still insulated wire (current off). I have motors with fewer parts- but they operate on more complex principles.

Tesla's Egg of Columbus

Get this amazing (and affordable) reproduction here:
From engineDIY: BUY NOW: Tesla's Egg of Columbus
This version comes with a 35mm solid aluminum sphere. 

Get the aluminum phiTOP "egg"  here: BUY NOW phiTOP 

Tesla’s Egg of Columbus: an aluminum ellipsoid egg (PhiTOP) mysteriously spins and stands upright in this modern version of Tesla’s famous demonstration from the 1893 World’s Fair in Chicago that first showcased the principles behind wireless power transfer and his AC induction motor. The base has no moving parts- instead special copper windings (very similar to Tesla’s original design) form four electromagnet coils on a circular steel core, and a special circuit supplies each with AC currents in such a way that a rotating magnetic field is created. This rotating magnetic field from the coils under the concave glass induces electric eddy currents to flow in the aluminum ellipsoid- these currents then create their own magnetic field which oppose the initial fields underneath and pushes the ellipsoid to spin. Finally, the ellipsoid top stands up vertically (when spun with sufficient rotational velocity) due to physics similar to that of the tippe-top. 

 

 

Magnetic Suspension Lamp

Available for under $100 US: 
From Amazon: BUY NOW 
Magnetic Suspension Lamp 

From eBay: BUY NOW 
Magnetic Suspension Lamp 

Magnetic Suspension Lamp: not only does this lamp defy gravity, the LEDs in the bulb are powered through wireless induction (no batteries needed). This kind of levitation uses a control system with an adjustable electromagnet in a feedback loop with Hall effect sensors which allows for fine tuning of the magnetic field to exactly balance the pull of gravity. If this lamp design is unplugged (or the power goes off) the bulb assembly does not fall, but instead snaps onto the upper armature via strong permanent magnets embedded within. Amazing physics demonstrated by clever engineering!