All physicsfun toys

Arch Balance Toy

Get this elegant toy here:

From Ludu Ludi in Spain: Nivana Balance Toy

Arch Balance Toy: this elegant sculpture toy seemingly defies gravity- a careful placement of the pendulum will locate the center of mass of the arch + pendulum system directly above the 1cm wide foot of the arch, creating a state of unstable equilibrium. No magnets used or needed for this physics! Hang and balance your favorite object from this arch. Made in Spain by Pico Pao, the Nirvana balance toy come with an old fashioned throwing top as the pendulum bob.

Centripetal Kinetic Toy

This "iBall" desk toy is no longer in producltion. Howerver, a similar version of this toy can be made from these components:

From Amazon: BUY NOW: two piece acrylic shell

From Amazon: BUY NOW: 1/4 inch ball bearings

Centripetal Kinetic Toy: seven rolling steel balls hug to the inside of the acrylic sphere given sufficient velocity. Here the balls are launched such that their orbits are in the same plane, and due to their angular momentum (and a torque due to gravity) the plane of rotation precesses like the axis of a spinning top until friction slows them down. This toy was made in 2007 (sadly no longer in production) and marketed under the name "iBall". 

Reuleaux Rotor

This toy is availble from Amazon Japan and will ship to the US:

From Amazon.jp: BUY NOW: Reuleaux Rotor Wodden Toy

Reuleaux Rotor: this famous curve of constant width, the Reuleaux triangle, can rotate such that at all times it remains in contact with all four sides of a square. As demonstrated by this wooden toy from Japan, the rotor covers approximately 98.77% of the area of the square, missing only the sharp corners. The curves in the corners are in the shape of an elliptical arc. Fun fact: a Reuleaux triangle has a perimeter equal to pi times its width- just like a circle! 


Tea Candle Steam Engine

Get one from these fine sources: 
From Educational Innovations: BUY NOW Tea Candle Steam Engine 
From Amazon: BUY NOW Tea Candle Steam Engine 

Other interesting engines available here: Simple Heat Engines

Tea Candle Steam Engine: a functional piston steam engine complete with boiler and flywheel. Takes about 2 minutes to get going after the candle is lit. The invention that powered the industrial revolution on a desktop! Made by Wilesco. 

Disappearing Spoon

Gallimum metal and a silicone mold to produce the spoon- available here:

From Amazon: BUY NOW: Gallium Mold Spoon Kit 

Disappearing Spoon: the metal gallium has a melting point of 30°C (86°F) and will melt quickly when exposed to tea temperature hot water- or melt in one’s hand if handled too long. This spoon was made with a silicone mold (swipe to see process), and feels and sounds just like a regular spoon, except solid gallium is brittle and the spoon can shatter like glass if dropped. An amazing parlor trick as well as a classic and historical class demonstration.

Half Seirpinski Octahedron Fractal

Get this amazing 3D print here:
From Etsy: BUY NOW: Seirpinski Pyramid

or print it yourself:
From Thingverse: Seirpinski Pyramid

Half Sierpinski Octahedron Fractal: this 3D printed math sculpture is one half of the sixth iteration of what is called “the octahedron flake” a 3D fractal based on the Sierpinski triangle. To make this fractal, on each iteration an inverted triangle is removed from the center of the previous triangle, and if this process is repeated indefinitely one gets the famous fractal. For this 3D print, the maker Travis Quesenberry used rainbow silk PLA to create the beautiful color gradient base on the .stl files by Rick Tu. Another example of math brought to life via 3D printing! 

 


Reflective Diffraction Laser Disk

These vintage items are currently available here:

From eBay: BUY NOW: Laser Disk Spinner

Reflective Diffraction Kinetic Art: a vintage sheet metal disk spins with patterns created from reflective diffraction gratings- seen here illuminated by a light panel and by a single LED flashlight. Produced in the 1990s, and this version has a Star Trek theme. 

Sodalite Fluorescence 

Get sodalite-bearing syenite river stones here:

From Etsy: BUY NOW: Sodalite Glow Rocks

You will also want an awesome UV flashlight like this one:

From Amazon: BUY NOW: High Power UV Light

Sodalite Fluorescence: in daylight this rock looks like an ordinary river stone, but when illuminated with long wave ultraviolet light, patches of the mineral sodalite shine in bright orange glow. These stones are comprised of sodalite-bearing syenite, where syenite is a course grained igneous rock similar to granite but deficient in quartz. Found on the shores of Lake Superior- discovered in 2017 by Erik Rintamaki.

 

Corona Discharge Trajectories

Mini Tesla coil with wire end attachment- get one here: 
From engineDIY: BUY NOW: Mini Tesla Coil

Long exposure image captured using this Slow Shutter app: 
 
From App Store: BUY NOW: Slow Shutter Cam 

Corona Discharge Trajectories: the ejected electron stream propels the end of a thin wire connected to a miniature Tesla coil. The corona discharge creates a glowing plasma at the end of the wire, but also imparts momenta that pushes the wire’s end into a final state circular orbit. The more interesting behavior occurs during the initial transient orbits which seem to be hypotrochoid type curves beautifully captured here using the Slow Shutter app. Please see seven posts back for details about this mini Tesla coil. 


3D Wordflip Sculpture

Create your own here:

From sparenbergdesign.com: BUY NOW: 3D Wordflip

3D WordFlip Sculpture: from one point of view my logo appears, rotate 90 degrees and the sculpture reveals my tagline phrase “real magic”. Alternatively the messages can be cast as shadows (swipe to view). Amazingly you can create and print any two phrases of your choosing from the webpage of artist and designer Joris Sparenberg.

1790 Terrestrial Globe by Mova

Available for all the planets and several versions of Earth: 
From Amazon: BUY NOW 
Mova Globes: all types 

From Amazon: BUY NOW 
Mova Globes: 1790 Terrestrial

From eBay: BUY NOW 
Mova Globes: all types 

Octopus Stand available here:
From pyrofarms: BUY NOW
OctoStand in Metal

1790 Terrestrial Globe by Mova: rotating counterweighted globe sealed within a clear liquid filled acrylic sphere. The rotation in a Mova globe is powered by light that shines through the semi-transparent map image on to solar cells within 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. Wonderful physics of all kinds in the design of this clever device. The featured map is a faithful recreation of a globe famous for its accuracy at the time by Giovanni María Cassini and highlights the voyages of James Cook.

 

Square Dissection Puzzles

Get these and other well made disection puzzles here:

From Etsy: BUY NOW: Square Dissection Puzzles

These puzzles are expertly laser cut and sold by GamesEfce. I spray-painted the pieces of mine to better show the shapes and relationships for the video. 

Square Dissection Puzzles: a square can be cut (dissected) into polygons and then reassembled into other regular polygons. Shown here: an equilateral triangle, a pentagon, and a hexagon. These are the record holders for smallest number of pieces needed: triangle (4 pieces by Henry Dudeney 1902), hexagon (5 pieces Paul Busschop 1870s) and pentagon (6 pieces Robert Brodie 1891). Fun fact- It is not known if any of these records are the smallest possible, no mathematical proofs yet exist on this question.


Poly acrylamide Polymer Vanishing Act

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

Poly-acrylamide Polymer Vanishing Act: these spheres of hydrophilic polymer have an almost identical index of refraction as that of water- thus when submersed they become invisible. Note the elasticity of these spheres from the way they bounce, while at the same time they refract their surroundings as a spherical lens. The super absorbent spheres start as hard crystals with a radius of 2mm and grow to 11mm when immersed in water. So much physics going on here! 

Fluorescent Corundum (Ruby) in Matrix

Get ruby in matrix stones and jewelry here:

From Etsy: BUY NOW: Ruby Glow Stones

You will also want an awesome UV flashlight like this one:

From Amazon: BUY NOW: High Power UV Light

Corundum (Ruby) in Matrix: the pink/red mineral inclusions in this polished sphere of fuchsite are ruby crystals. Ruby fluoresces in bright red light when exposed to long wave UV light (such as a black light), creating the illusion that the sphere is lit from within. The same fluorescent property of synthetic ruby allowed creation of the first lasers.

Hero's Engine

This live steam engine is available here:

From EngineDIY: BUY NOW: Hero's Engine

Hero’s Engine: the very first steam engine ever devised, the Aeolipile is a radial steam jet reaction turbine, an a invention attributed to Hero of Alexandria in the year 1 AD. Water within the spherical container is heated to produce steam which exits through nozzles directed at right angles to the radial direction, and by Newton’s third law these jets produce a torque about the rotation axis. There is no historical record of this engine being put to practical use in ancient times- except perhaps as the world’s first physics toy!


The iTOP

Well engineered brass spinning toys by SiriusEnigmas:

From Etsy: BUY NOW: The iTOP 

From Etsy: BUY NOW: The PhiTOP

From Etsy: BUY NOW: The eTOP

From Etsy: BUY NOW: The PiTOP

The iTOP: inverting spinning disk- the equilibrium state for a spinning thing is often different from that of the same object when stationary. When spun, the iTOP almost instantly inverts to raise its center of mass (shown in slow motion because it happens so fast). However, when the rotation speed decreases to a certain rate the system becomes unstable (shown again in slow motion) and flips again before going into a rolling/spinning motion like a coin. This top completes the set of four spin tops by astrophysicist Kenneth Brecher, all made of polished brass and themed on a mathematical constant. Swipe to see a demonstration of each: iTOP (square-root of -1), PhiTOP (golden ratio, φ), eTOP (base of the natural log), and the PiTOP (C/D of a circle, π). 

 

Rheoscopic Sworld

Get a Sworld ball (choose a color) here:

From Amazon: BUY NOW: Sworld Rheoscopic Ball

Also- the best in rheoscopic kenitic art- see: the Vortex Dome

Rheoscopic Sworld: this nice example of fluid flow kinetic art uses rheoscopic fluid encased in flexible bubble of plastic to reveal the intricate motion of turbulence. A suspension of tiny flat mica crystals tend to align themselves at the boundaries where the fluid is moving comparatively faster or slower, making the typically invisible flow patterns visible. 

Advanced Gyro: Hybrid Spinning Top

Get one from David Fowler's shop: 
From PhysicsHack: BUY NOW: Advanced Gyro
Made with extraordinary craftsmanship and high quality materials, and sold at a very reasonable price! 

Hybrid Gyroscope Top: the Advanced Gyro is a new design by @physicshack and in defiance of gravity this gyroscope can hang from a string attached only at one end. No pull cord needed, this unique design spins up via friction with a working surface (thin cardboard works well) and applying a circular motion to bring the rotor up to 1000s of RPM. Machined from solid stainless steel this top weighs in at about half a kilo, providing inertia that produces long spin times.