Uphill Roller
This set available here:
From Amazon: BUY NOW: Uphill Roller Double Cone
Uphill Roller: a double cone (like two funnels connect by their tops) will roll up a set of inclined rails. Although the bi-cone rolls toward the higher end, its center of mass descends due to the geometry of the rails. This curious construction was first published in 1694 by the noted surveyor William Leybourn to promote “recreation of diverse kinds” towards the “sublime sciences”. Physics fun from three centuries ago!
Jacob’s Ladder Image Flip
Available from this shop in Spain:
From Punto Verna: Reproduction Jacob's Ladder
Classic versions of this toy available here:
Amazon: BUY NOW Jacob's Ladder Toys
The same ribbon hinge mechanism is used to make the "magic" wallet click here
Jacob’s Ladder Image Flip: with a twist of the wrist this reproduction flips back and forth between an image of Queen Victoria and that of Prince Albert with a satisfying click-clack sound. The earliest description of the ribbon hinge mechanism that creates this kinetic illusion of cascading blocks comes from a magazine article in Scientific American in 1889.
Star Wars Illusion Cube
These vintage fast food toys can be found on eBay:
From eBay: BUY NOW Star Wars Illusion Cube
Star Wars Mirror Illusion: Symmetry + Reflection = Illusion. A two sided mirror and symmetric images combine to make this Taco Bell toy from 1996.
Aqua Drop Puzzle
Three models/colors to choose from:
From Amazon: BUY NOW Aqua Drop Puzzles
From eBay: BUY NOW: Aqua Drop Puzzle
Aqua Drop Puzzle: a superhydrophobic coating allows this dexterity puzzle to use a drop of water as the "pinball". The white surface is a silica nano-coating that makes water roll off- a condition sometimes referred to as the Lotus effect because leaves of the Lotus plant have this property.
Wooden Trapped Sphere in Cube
(out of production)
Trapped Sphere in Cube: a surprising aspect of the geometry of spheres and cubes- carved from a single block of wood is a sphere trapped within a cube frame. A classic folk woodworking novelty reconceived here with precision machining to create this seemingly impossible object.
Impossible Bolt
Only available from these aritist/craftsmen:
From Etsy: BUY NOW: Impossible Bolt & Nuts
Impossible Bolt: one nut threads on clockwise as normal- the other threads on counterclockwise on the same bolt! Not impossible- but carefully engineered and machined. Swipe for partial hint on mechanism. This puzzling curiosity was inverted by Scott Eliott and machined in solid brass by puzzle crafters Steve Nicholls and Ali Morris of TwoBrassMonkeys.
Perspective Puzzle
Vintage puzzles in this series are sometimes available on eBay:
From eBay: Search NOW Virtual Illusion 3D Puzzle
Perspective Puzzle: ten flat images, when ordered and spaced correctly, combine to produce this 3D illusion of structure and depth. This vintage toy by Mattel was sold as “Virtual Illusion 3D Puzzle” where the challenge is to scramble/shuffle the 12 sheets and then place them in the correct orientation and order to complete the image. A fun application of the math and physics of anamorphosis and perspective.
Raketti Puzzle
Versions of this puzzle avaioable fron these sources:
From CuriosityBox: BUY NOW Raketti Physics Brain Teaser
From Etsy: BUY NOW Raketti Physics Puzzle
Raketti Puzzle: physics brain teaser- the challenge is to remove the cone topped cylinder from the hole without touching the bottom container (no fair using sticky tape or such). It can be done in a matter of seconds! The solution to this puzzle (like others featured here) relies on some fun physics principles.
Coin Escape Puzzle
Available here:
From eBay: Search NOW: Coin Escape Puzzle
From Grand Illusions: BUY NOW: Coin Escape Puzzle
Another coin escape puzzle (fits US Dollar), the YOT:
From Amazon: BUY NOW
Silver Dollar Escape Puzzle
Coin Escape Puzzle: physics brain teaser- remove the coin without breaking the container or using any tools other than your hands. Of course you spin it to get the quarter out- but exactly how? The solution to this puzzle (like others featured here) relies on some fun basic physics of spinning things. Answer below and swipe to reveal solution.
Anti-Gravity Puzzle
This particular puzzle by puzzlab.com is no longer in production.
However (spoiler), it's possible to creat a version of this puzzle with these:
From Educational Innovations: BUY NOW Growing Spheres
"Anti-Gravity" Puzzle: a physics brain teaser- what's the trick here? Four glass marbles can move but stay separated in this liquid filled tube no matter the orientation- why do they not touch?
Balance Stacking Sculpture
Another wonderful desing by BinDesign- get one here in black or natural wood:
From Etsy: BUY NOW: Bin Design Balancer Puzzle
Balance Stacking Sculpture: a series of torques in unstable equilibrium complete this Calder-esque structure. As each component is added its weighted end balances all the others before it, with the initial small piece weighing about a gram or so. Remove the end piece and the whole structure comes down. Another wonderful design by artist Bin Xu.
Magnetic Cube
Many colors to choose from:
From MagneticCube.com: BUY NOW Magnetic Dice Cube
See also the original indestructibles post: Magnetic Acrylic Rubik's Cube
Magnetic Cube: a twisty Rubik’s Cube puzzle made from 27 dice and 108 neodymium magnets. This cube includes the scrambled states and solutions of the original 3x3 Rubik’s Cube but is held together only by magnets! The magnets, in this special configuration, lock the dice together with a satisfying click upon rotation. This beautiful cube was produced by Owen Lillywhite of magneticcube.com and is based on a gfixler design posted on instructables.
Hydrophobic Water Maze
Wonderfully well crafted and available from this shop :
From Etsy store TheSmallestWorkshop:
BUY NOW Hydrophobic Water Maze
Hydrophobic Water Maze: a superhydrophobic coating allows this dynamic puzzle to use a drop of water as the "pinball", which can split into multiple smaller drops and recombine along the way. The wood surface is treated with silica nano-coating that makes water roll off- a condition sometimes referred to as the Lotus effect because leaves of the Lotus plant have this property.
Magic Sand Wand Puzzle
This puzzle was produced in the 1990s, sometimes found on eBay (currently two avialable):
From eBay: SEARCH NOW: Magic Sand Wand Puzzle
Wikipedia has a good introduction to the possible mechanisms of the Brazil nut effect
Magic Sand Wand Puzzle: this week’s physics brain teaser- move the steel ball through the sand to the other end of the tube. Amazingly it can be done in less than 6 seconds! Hint: spinning won’t help this time. The solution to this vintage puzzle relies on some interesting physics concerning granular convection. Answer below and swipe to reveal solution.
Ice Melt Demo
Get this similar demonstration kit here:
From Educational Innovations: BUY NOW
Ice Blocks Melt Demo
Ice Melt Demonstration: Wood or Aluminum- which will melt the ice fastest and why? Both blocks start at the same temperature (room temp) and have the same shape and volume. Swipe to reveal result shown in real time (not sped up!) Hint: Although both blocks are at the same temperature, the aluminum feels cool to the touch and the wood block feels warm. Those who have taken basic physics should have an advantage on this question- one block is an excellent insulator and the other a conductor.
Impossible Caged Golf Ball
Some nice versions of this impossible object available here:
From Etsy: BUY NOW: Golf Ball in Wood Cage
See more of these thought puzzles in my collection here: Impossible Objects
Impossible Caged Golf Ball: Here a regular off-the-shelf golf ball is somehow trapped within a cage made from a solid piece of hardwood walnut. Neither the ball nor the wood were cut or glued in the fabrication process. The puzzle aspect is to consider how this object was produced (I have some theories- but I do not know the secrets of this artist).
3D Pentominoes
The set I used for this video is called Pocket Katamino and is available here
From Amazon: BUY NOW Pentominoes
3D Pentominoes: the 12 possible arrangements of five identical squares, joined edge to edge, form the set of all pentominoes. Since 12x5=60, the pentominoes can tile a 6 x 10 rectangle with no gaps (2339 ways to do this- yet even finding one solution is a challenge). This set of colorful pentominoes is made so that the height of each piece is the same as the width of the constituent squares, such that 3D constructions can be made. Since 3x4x5=60 one can build a box with these dimensions (amazingly, 3940 ways to do this- but again, finding one is still a fun challenge).
Elastic Equilibrium Puzzle
Get this puzzle here:
From Amazon: BUY NOW: Atomic Cherry Puzzle
Elastic Equilibrium Puzzle: six spheres held together by three plastic springs. When assembled each sphere exerts the same force on its four neighboring spheres, producing this equilibrium state only if all six spheres are used to balance all the forces. A fun configuration to analyze in a 1st year physics course- the Atomic Cherry by Brainwright puzzles.