is a visual programming environment from MIT Media Lab.
You can program anything, game, anime, music and etc by building blocks without keyboard.
PicoBoard is a sensor board that detects light, sound, button, sliders and resisters, and transforms them into the values of Scratch.
WeDo is a robot kit from LEGO education. It is like Mindstorms but it can be controlled by Scratch.
I wrote a sketch to emulate PicoBoard and WeDo for littleBits Arduino module. So you can play Scratch with all of littleBits modules.http://squeakland.jp/abee/tmp/NanoBoardAGWithMotors.zip
The Arduino sketch is based on NanoBoard by by Tomo Niimura.
And NanoBoard is based on HelloBoardV2 by PINY and Song Hojun.
Those sketches are licensed under CC BY-SA.
Scratch Source Code is licensed under Scratch Source Code License by MIT.
NanoBoardAGWithMotor and NanoBoardAGWithMotors are licensed under MIT license by Kazuhiro Abe.