How to make a simple circuit. Teaching children about electricity
Er klemmt eine Klammer in den Kühlschrank. Die Idee? Fantastisch.
How to Make a Speaker
This is actually doable. Nothing crazy complicated and no impossible materials or tools.
Ambilight für jedes HDMI-Gerät! Die ultimative Schritt-für-Schritt Anleitung | PowerPi
Science Activity: Secret Colors in a Black Marker! | Exploratorium
Portable phone charger made out of an altoids case, usb port, and two double A batteries.
"Secret Word" is one of the most popular games on the Problem Site. The objective is to guess the word by selecting letters from the alphabet. They turn colors to let you know which letters you picked are in the word, and which letters are in the right location in the word.