Musicians have got together to make tunes from old electronic kids' toys.
Its called circuit bending and tunes are created when the circuit board in the toy is re-wired to make a different sound to the one it's meant to make.
GameBoy consoles and old Speak and Spell computers top the list of favourite instruments and tunes range from ballads to funky.
In the USA this music has become so popular that fans recently held their own festival in New York.
But experts warn that circuit bending comes with an important safety rule - don't try it at home.