littleBits
“littleBits is a platform of easy-to-use electronic building blocks that empower you to invent anything, from your own remote controlled car, to a smart home device. The Bits snap together with magnets, no soldering, no wiring, no programming needed.” A quick an easy way to make circuits, with over 70 different modules available. Individual elements start at around £8, while a classroom starter pack for use by up to 3 pupils is around £230 ex VAT.
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