If you have an ear for music and want to drive those living under the same roof with you nuts, then the Stylophone Original certainly sounds like a very viable idea.

Well, basically, this bizarre little battery-operated instrument is a box packed with transistors, resistors, diodes and other old-school electronic bits and bobs. The idea is to press the integral stylus against the various metal keys in order to close the circuit and emit a peculiar but unique squeal. This re-issued version is just the same as the original except you can now control the volume (phew!) and play along to your MP3 tracks (bizarre). There are even a couple of all-new Stylophone sounds and a vibrato knob.

The price to pay for being a general nuisance wherever you are? £14.95.