micro:bits

The micro:bit is a pocket-sized computer can that can be made to interact with built-in sensors and buttons to make its 25 LEDs flash in different patterns, letting it display - for example - letters and numbers.

In addition, it can be connected to other computing kits via its input-output rings - including the Raspberry Pi, Arduino and Galileo - to carry out more complex tasks.

micro:bit 10 Student Classroom Pack
Inventor's Kit for the BBC micro:bit
BBC micro:bit - Go Kit