If you submit some Wallace & Gromit-themed artwork to WallaceandGromit.com, one talented winner's creation will appear in "The Bogey Man", episode 4 of Wallace & Gromit's Grand Adventures. Plus, that person will get a free season set of the game. Three runners-up will also receive a free Wallace & Gromit season!
The submission form and details are here: http://wallaceandgromit.com/creations/upload
Good luck! Submit your stuff before 5pm GMT on May 1st for a chance to win.