The Micro Bit itself is a circuit board measuring just 50x40mm with two buttons and an array of 25 red LEDs in a 5×5 arrangement. It will come in various colours, including green and blue. Kids can program the board via a web-based interface to do many things, including flashing up numbers, letters and scrolling messages on the LEDs. Plus, since there’s a built-in accelerometer and compass, it can detect movement and tell which way it’s pointing.

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