This is the cheapest I have seen these so far, please correct me if I am wrong but they're about £12 everywhere else, this is the one that makes the noises ! (if you have a Ben10 fan at home you will know what i mean !)
The Omnitrix is an alien watch which allows Ben 10 to transform himself into several alien superheroes.
With flashing red and green lights, and transformation sound effects taken from the TV series, the Omnitrix F/X is just like the real thing. Turn the dial to select one of 10 aliens and set off in search of a villain to vanquish!