Littlebits Makey w14 Invention Manual page 26

CONDUCTORS VS.
INSULATORS
WITH ALLIGATOR CLIPS, YOU CAN ADD CONDUCTIVE MATERIALS TO YOUR INVENTIONS
POWERED BY THE MAKEY MAKEY
like fruit, are materials that easily let an electric current flow through them.
CONDUCTORS,
like socks, are materials that don't let an electric current flow
INSULATORS,
through them. These won't work with your Makey Makey Bit.
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BIT . SOME MATERIALS WORK BETTER THAN OTHERS.
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