The BBC has finalized the design of the micro:bit, the tiny computer it will give to 1 million British schoolchildren later this year to help them learn about computing.

With its technology partners, the U.K. public service broadcaster unveiled the micro:bit’s final design on Tuesday, and gave more details of the videos, lesson plans and other teaching resources it plans to accompany it.

At 5 centimeters by 4 cm, the micro:bit is about half the size of a Raspberry Pi, the ubiquitous single-board microcomputer—but with two push-buttons and a grid of 25 LEDs as its main user interface, the device perhaps appears to have more in common with the MITS Altair 8800.

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