Hi Everyone :) Welcome back! I get asked often: "Where did you get all this stuff?" My goal is to share the real magic of science and physics- and to this end I will update here (and in my store) suggestions on where to get some of these toys, kinetic art pieces, and scientific curiosities for yourself. Purchasing items from the links on these pages will help support my IG page of science and wonder. Buy physicsfun toys on : https://bit.ly/2MOjFET (Official websit 🇺🇸) physicsfun toys on amazon : https://amzn.to/36RRxt0 Follow on Instagram : @physicsfun This video contains : 👉🏻 Rolling Uphill Illusion: the ball bearings seemingly roll uphill as if attracted by magnets of some kind. What’s going on? 👉🏻 Transmission Hologram: vintage hologram from the early 1970s. The 3D image is only made visible by backlighting the plate with the coherent light of a laser. One of the first holograms to be mass produced for those rich enough to own a laser back then (as this was years before diode laser pointers were available). 👉🏻 Caustic Projection Optical Element: the intricate geometries of light due to refraction through various curved surfaces of transparent plastic. 👉🏻 Slow Dance: a kinetic sculpture via induced vibration and high speed strobe lighting in which objects exhibit subtle and graceful motion when mounted within this special frame. An elegant electromagnet supplies the physics to induce the motion seen as the beautiful copper windings prominently featured at the bottom of the frame. Electronics within the frame send AC currents to the electromagnet which then pushes and pulls magnets on each side. These magnets are affixed to leaf springs to which feathers, flowers, and other objects are attached with elastic bands. The arrangement is then illuminated by LEDs set to strobe at just the right frequency to produce the slow dance illusion. 👉🏻 Uphill Roller: a double cone (like two funnels connect by their tops) will roll up a set of inclined rails. 👉🏻 Stirling Engine: an elegant model of an external combustion heat engine with dual reciprocating pistons which operates by cyclic compression and expansion of air. 👉🏻 Hyperbolic Holes: a straight rod, in this case a pencil, glides through a symmetrical pair of curved holes related to the famous conic section. The design is based on the hyperboloid, the 3D ruled surface traced by an offset rotating diagonal line. 👉🏻 Balance Man Chaotic Pendulum: a vintage stickman sculpture acts as a type of chaotic pendulum when spun up on a smooth surface. 👉🏻 Fresnel Minor Lamp: precision geometry and dichroic glass create an explosion of colors in this incredible creation by artist seanaugustinemarch. 👉🏻Hero’s Engine: a favorite engine in my collection and the very first steam engine ever devised, the Aeolipile is a radial steam jet reaction turbine, an invention attributed to Hero of Alexandria sometime between 10 and 70 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 the steam ejected by 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! 👉🏻 Viscous Flow Mixing Bulbs: art from mixing high viscosity fluids. Each LED bulb from EP Designlab captures a unique pattern based on the physics of nondiffusive turbulent flow resulting from the mixing of viscous fluids- in this case silicone resins. When the resins cure the pattern is captured and frozen in place ready to display as illuminated by an array of 5 LEDs in the standard E26 bulb base. With this process no two bulbs are alike, and all capture intricate mixing physics. 👉🏻 Kaleidoscope Symmetry Physics Background music by : YouTube Audio Library 1) Cosmic Drift - DivKid 2) Bonfire - An Jone 3) Icelandic Arpeggios - DivKid 4) Bay Street Billionaires - Squadda B 5) Wehrmut - Godmode