a fun introduction to topology is this article "Using Asteroids [the game] to explain the topological classification of 2-manifolds" http://everything2.com/use

a fun introduction to topology is this article "Using Asteroids [the game] to explain the topological classification of 2-manifolds" http://everything2.com/user/sockpuppet/writeups/Using+Asteroids+to+explain+the+topological+classification+of+2-manifolds http://everything2.com/user/sockpuppet/writeups/Using+Astero...