It started with stamping feet

British musician and drummer Sudha Kheterpal who made her name with the band Faithless, invented the 'Spark' which is designed to be shaken like a maraca.

When you shake the Spark, 'a magnet moves backwards and forwards through a coil to generate power and this power is stored in an in-built battery.' (Source: BBC News Online - Shake, Rattle and Charge; )

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