This Simpson's themed wave machine was made back in 1999-2000 and is hard to find. Here is a fairly inexpensive wave machine that has a similar base mechanism:
From eBay: BUY NOW Liquid Wave Machine
Surf's Up Wave Machine: Bart rides a surfboard between two immiscible liquids which are sorted under gravity by density with the densest (dyed water) on the bottom and the lightest (mineral oil) on top. Bart’s board has a density between that of the two liquids so it stays at the boundary layer, and a capsule of air above Bart’s head keeps him upright. The motorized rocking mechanism in the base is powered by one C cell battery and produces the waves at the boundary layer by sloshing and colliding the dense liquid off each end. Found this rare 1999 toy on eBay.
Galton Board version available here:
From Amazon: BUY NOW
The Random Walker: second model of two Galton Boards designed and produced by IFA.com- this version is made to demonstrate probability in investment returns of a global stock market portfolio relating to risk capacity. Slow motion reveals the erratic path of each steel ball (second half of video). The red graph shows the distribution of 592 monthly returns (mean =1%, SD=5%) representing data from 50 years of an IFA Index fund- here the random “walk” of 3000 steel balls falling through 12 levels of branching paths always produce a close match, and both distributions tend toward the famous bell curve distribution. A wonderfully designed modern version of the Galton Box invented by Sir Francis Galton(1894) to demonstrate the Central Limit Theorem - showing how random processes gather around the mean.
Get one here:
From Etsy: BUY NOW: The DeltaCELT
The DeltaCELT: a new rattleback design where the indentations create an asymmetry in the distribution of mass that leads to rotation reversals when spun: 1) If spun clockwise, after about two full rotations, a complicated combination of friction, precession, and instability induced vibrations transforms the rotational energy into into end-to-end rattling (energy of oscillations) and then into rotational energy in the opposite direction. 2) If spun counter-clockwise, after about 30 full rotations the rotational energy translates into side-to-side oscillations leading to a clockwise reversal (swipe to see- less dramatic but still amazing). The design is made of solid brass and has the shape of a bisected prolate ellipsoid in the proportion of the mathematical constant δ =4.669.. (Feigenbaum dynamical constant) giving the name to this new design by astrophysicist Kenneth Brecher. The DeltaCELT comes with the polished slate spinning surface for optimal performance.
Get this super nice, affordable, and fun to assemble kit here:
From KiwiCo: BUY NOW: Glow Pendulum Kit
Get amazing quatilty science kits delievered to your home- this glow pendulum is part of the Tinker Crate subscription.
From KiwiCo: LEARN MORE: Tinker Crate Subscription
Glow Trace Chaotic Pendulum: this fun and amazing DIY kit features a UV diode to trace the intricate path of this double pendulum system on to a phosphorescent screen, revealing the physics of chaotic motion. It’s amazing that such complex motion can arise from a simple assembly of two pendulums, one attached to the end of the other. Chaotic motion, such as that observed here, is characterized by extreme sensitivity to initial starting conditions, tiny differences in how the system is released leads to dramatically different outcomes each time.
Get this amazing sculpture here:
From Amazon: BUY NOW: Square Wave Horizon
See also: The Square Wave (Original)
Square Wave Horizon: a second incarnation of Ivan Black’s Square Wave interactive kinetic sculpture- in this version 20 interlocking right angle metal rods are mounted horizontally with accompanying base and grips at each end which allows one to rotate the structure to and fro. Waves propagate, folding the structure into a tight curl- and a reverse snap will bring it back to the initial flat square state. An important design feature is that each right angle rod is limited to move through about 45 degrees, and all through parallel axes, allowing for the beautiful rotational wave motion via a cascade of angular momentum transfer.
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.
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!
Get these wonderful laser cut sets here (I only added some bright spray paint):
From Etsy: BUY NOW: Non-Circular Gears
Non-Circular Gear Trains: a survey of a few designs using gears with some interesting shapes that can produce variations in rotation speeds. Swipe to view: two oblong gears, four squircle gears, and two logarithmic spiral gears. Just a small sample of the infinite possible shape combinations and arrangements of non-circular gear sets. With thanks to the Jeux Efce shop for sending me these wonderful laser cut gears and mounts.
Available for all the planets and several versions of Earth:
From Amazon: BUY NOW Mova Globes: all types
From Amazon: BUY NOW Mova Globes: Jupiter
From eBay: BUY NOW Mova Globes: all types
From movaglobes.com: BUY NOW Mova Globe: Jupiter
Jupiter Globe by Mova: rotating counterweighted globe sealed within a clear liquid filled acrylic sphere. The rotation is powered by light that shines through the semi-transparent Jupiter globe 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.
Many styles/colors to choose from:
From Amazon: BUY NOW: Lollipopter Kinetic Art
The Lollipopter (The Helicone): one of my favorite interactive kinetic sculpture designs. With a bit of practice one can master the transformation in both directions: A snap of the wrist imparts angular momentum to the "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. A creation by artist John Edmark.
Get one here:
From Amazon: BUY NOW: Magnetic Base Pen
Magnetic Equilibrium Pen: a weighty and elegant writing pen dances on its tip when released, trapped against gravity by a magnetic field. A strong neodymium magnet in the base allows the pen to stand on its tip even when the base is tilted.
Get this kit here (comes complete as shown in my video):
From engineDIY: BUY NOW: Magnetic Levitation Module
The featured sculture is by Bathsheba Grossman, affordable and beautiful math art available here:
From Etsy: BUY NOW: Soliton Sculpture
Electromagnetic Levitation Module: this engineered control system uses adjustable electromagnets (four copper coils) and and two Hall effect magnetic field sensors (held firm embedded in white silicone) to levitate an 5cm diameter neodymium magnet platform about 3 cm in mid-air. A feedback loop informed by the Hall effect sensors allows fine tuning of the magnetic field to exactly balance the pull of gravity, and is powered by a standard USB connection. The platform also rotates, perfect for showcasing one of my metal 3D printed mathematical sculptures by Bathsheba Grossman.
Get this version here:
From Amazon: BUY NOW: Pendulum Snake
Pendulum Snake: 15 independent swinging pendulums, each with a slightly longer period than the one to its left side, create mesmerizing wave patterns. As the pendulums get further out of phase with each other the waves become shorter and faster. This order and pattern is quickly destroyed if two of the pendulums were to collide (swipe for demonstration).
Get a set here:
From eBay: BUY NOW Tornado Spheres
Get a concave mirror like the one in the video for less than $3 here:
From Amazon: BUY NOW Concave Mirror
And get a set of inexpensive colored lights here:
From eBay: BUY NOW Color LED lights
Tornado Spheres: two ball bearings welded together can be made to spin up to 2000+ rpm by the Magnus Effect using a stream of air. Shining three colored LEDs on the spinning pair produces an illusion of floating rings along with a second illusion that these rings are rotating and changing direction due to aliasing with the frame rate of the video camera (like the famous wagon-wheel effect).
Get a PhoTOP from these fine vendors (comes with laser pointer!):
From Educational Innovations: BUY NOW PhoTOP
From Vat19: BUY NOW: PhoTOP
Another amazing spinning device by Prof. Ken Brecher! Get his other spinning tops here:
From Etsy: BUY NOW: PhiTOP, PiTOP, eTOP, iTOP, DeltaCELT
The PhoTOP: phosphorescent glow illuminates the intricate path of a 405nm laser pointer beam on a balanced spinning disk. Let the disk set alone for a few minutes to allow the traces to fade- and repeat again and again to experiment making new patterns.
Many animations to choose from:
From Etsy: BUY NOW Cinspinner Animation
CineSpinner: motion animation from Moiré pattern effects of constructive and deconstructive interference. Affordable kinetic art by Scanimation creator, artist, and author Rufus Butler Seder.
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).