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👉 Shashibo Geometric Art: dissect a cube into 12 equal irregular tetrahedra, connect these pieces symmetrically with hinges, and add 36 magnets to create a device with more that 70 geometrically interesting and aesthetic configurations- a few are shown here. With practice the various transitions can flow very smoothly- this video captures some of my initial explorations with this unique puzzle.

👉 In or Out Illusion: this 3D printed sculpture incorporates the now famous Stubborn Arrow Illusion and features both a left and right handed version.

👉 Piezo Film Flicker: a neon bulb flashes from electricity created by the mechanical deformation of a strip of polyvinylidene difluoride (PVDF) piezo film. Rapidly fanning the flexible strip produces 5 to 7 flashes per bending cycle- each flash occurring when the strip generates near 90V- the breakdown voltage of the neon gas in the bulb. The piezo film sandwiched between insulating layers in this transducer module is only 0.1 mm thick! In general the piezoelectric effect is the ability of certain materials to generate electric charge when deformed under mechanical stress. Thanks to Tim Rowett for providing me with this amazing physics toy.


👉 Dudeney's Dissection: an equilateral triangle can be cut (dissected) into four pieces that will then assemble into a square.

👉 Spiral Oil Drop Timer: when this drop timer achieves its steady state the drops form with amazing regularity in terms of both the size of the drop and the spacing between drops.

👉 Photicular Book: the latest in the photicular series- this time with scientific reconstructions of ancient beasts!

👉 Mirror Illusion Spacecraft Bank: Symmetry + Reflection = Illusion. Deposit a coin (which seems to vanish) and a spacecraft of some sort states to revolve within a silver ring seemingly suspended in space. The symmetry of the ring and craft allows a half of these objects to appear as a whole, and a AA battery powers a motor which drives gears to slowly spin the portion of the mirror inside the ring (with the spacecraft attached). The best version of the mirror illusion box I’ve seen.

👉 Balance Squid

👉 RIZE Spinning Ferrofluid Display: by mtrdesigns - a colloidal ferromagnetic liquid forms a spiked helix around the threads of a steel bolt in this kinetic sculpture. The bolt contains ferromagnetic iron which channels the field from the strong neodymium magnet in the base and focuses it into the spiral configuration.

👉 LIMBO Spinning Top: this high tech top will spin on surfaces regular tops can’t (like this pillow)- and remain spinning for 4 hours or more! Inside the metal casing of this top contains a motorized gyroscope powered by a USB rechargeable battery and regulated by circuitry that includes an accelerometer. The electronics detects when the top is spinning and engages the motor to add angular momentum to counter friction allowing the LIMBO to spin until the battery is depleted. Many thanks to Fearless Toys for sending me this amazing top!

👉 Modern LED Newton's Cradle: the classic physics demonstration of conservation of momentum and energy cleverly updated with LEDs and light sensors that synchronize color with changes in motion.

👉 Neon Flicker Flame Skull Bulb: no flame but instead emission spectra from excited neon gas due to the presence of a discharge electric current. The breakdown voltage of a gas (the minimum voltage needed for a current to flow) depends on the pressure of the gas in the bulb.

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