Argos have currently got on offer for £7.49 an additional controller for the Vtech smile along with the Toy Story 2 game.
The game on it's own is ironically still selling for £16.99 in argos.
I think the controller is worth about a tenner on it's own.
My little boy's got Toy Story 2 already and loves it!
The catalogue number is: 348/1437
Hope it helps someone out