My entry for this years "2007 PGD Annual Multiplexity" competition runnuing at www.pascalgamedevelopment.com

The whole game will take place in a kids playroom.
Up to 4 players will be able to collect building bricks with their toy bulldozer, transport them to their construction area and build towers out of the bricks. The game uses Newton Game Dynamics to enable physical behaviour to the construction part.
After a while the players are able to get cannons, catapults and other kind of offensive toys to destroy the towers of the other players. Even defense stuff will be able to be placed around the construction area.