Everyone on these forums is here for a reason -- they care about science games! But why? What was the game that turned you on to the notion that science + games = rad?
For me, one of my strongest memories of a science game was Electric Field Hockey by PHeT. I remember playing that in my high school physics class (...long ago...). The game was simple, but captivating. And it communicated a lot of science. I played and played until the teacher finally had to tear me away (or, more likely, the lunch bell rang).
It's probably no big surprise that this sim/game was an inspiration for me -- I've gone on to become a game developer myself, and many of the games I've made stem from the concepts behind Electric Field Hockey. (The Gravity Simulator, for instance, shares its sandbox feel, and The Electric Shocktopus basically puts you in the role of the EFH test charge.)
So how about you? What science games do you remember fondly, or derive inspiration from?