At Toys R Us, you can get a LEGO Hero Pack for $4.99 (regularly $24.99) with purchase of any LEGO video game.
These Hero Packs include a game guide and a T-shirt (youth large size). You can choose from Star Wars, Indiana Jones, and Batman.
This is valid 12/1 only. The older LEGO games are around $19.99, so for the equivalent price of the Hero Pack alone, you get a game, a game guide, and a shirt.
If you haven't gotten the games yet and have a large shirtless youth running around, now's the time to stock up. You'll already be at Toys R Us looking for the Series 3 Minifigures anyway.