Students learn the art of Furby reprogramming in a circuit bending workshop with Ben Goldstone. Below, an adept demonstrates the fruits of circuit bending knowledge as applied to a Kawasaki toy guitar.
cicuit bent "Double Neck" kawasaki toy guitar
Kawasaki motorcycle company licensed DSI Toys to use their name on a line of musical products. Unfortunately it's difficult to find online info about these particular electronic toys. If your interested in circuit bending and modifications to electronic sound toys here are some links worth exploring:
Metalriffs.com Guitar Toy Museum - a small picture gallery of electronic guitar toys.
Miniorgan.com - a private collection of rare small music keyboards and vintage musical electronic toys.
WarrantyVoid - the electronic sound toy and keyboard modification site.
Wikipedia Circuit bending - provides info and links to other websites.
If you're looking for online virtual sound toys and interactive music guides see the Museum of Sound Toys.