I've looked all around DA for a stamp for Sim City... and there aren't any, but boy there's a lot for Spore and the Sims... =/
So I made one for Sim City 4 Deluxe.
Anyhow, Sim City is the game that got Maxis on the map, the Sims and Spore are just things that got Maxis to be looked at by everyone including your anti-gaming mother in laws. However, all three are classified as "toys" and not as "games", despite the fact that there are clear a present goals you can achieve for.
Oh well, I guess I should stop rattling on...
Sim City (C) Maxis/EA Games