Physics not just for kiddos.
Two well-crafted physics games have surfaced. Many of the new flash engine type games are based on gravity, inertia, and object linking. Crayon Physics and World of Goo stand out above the rest. I find myself feeling bad for the little squeaky goos when they plummet into the blackness.
Crayon Physics is soothing like nap time at Kindergarten. Experiment with many ways to solve each puzzle.