Watch this straight rod pass through a curved hole and learn how it works
Laughing Squid posted this crazy video showing a straight rod passing through a curved hole. See below for an explanation on how it works.
YouTube user Shadow posted a video of an exhibit at the Museum of Science in Valencia, Spain that captures a visually engaging geometric concept, in which the angled position and movement of a straight metal bar allow it to move untouched through a parabolic opening in a solid plastic sheet.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.