The restaurant Del Taco has kids meals with prizes inside. For the release of Sonic Boom, they created the prize called "Clash Cubes", which are actually an interesting and fun concept. All the photos in this area are kept large so you can read what it's all about. 

In the gallary you can see the clash cube cards, you got 2 with every pack, enough to build 2 cubes for yourself. You punch out the sides & snap together your custom cubes according to the rules. The check list above shows you there are 48 sides total, & names them all. The Sticks side acts as a wild-card in this game, but you can only use 1 per cube. You roll the cubes like dice to play it.

It also comes with an instruction book seen above. The concept is pretty simple, but all manner of cool things could be added to make a complex game that would be for sale. The cube sides are made from plasticard so they are actually a bit tough. This is a very interesting fast food bonus item.