I’ve wanted to make a game in which the goal is to reproduce significant experiments and discoveries and to learn math and science.
One motif could be architecture because the religious desire to build bigger and more impressive religious monuments drove a lot of architectural discoveries which pulled along a lot of math and science discoveries.
On a practical side, an architecture game lends itself to the flash environment and it’s sophisticated set of physics-based tools. I could use real historical monuments and possibly even read how they came up with the designs. The game could also be more simple than math and science because most monuments have aesthetic qualities, too. So people who like to make pretty things or who want to be creative will be more interested in the game.