Drums, Engines, Sudoku, Poker Chips, Dodecahedrons

Some links I don't want to forget:

1. Drumkit implemented in Flash
2. Animated Engines.
3. Sudoku at Number-Logic.com: I've lost a lot of time here recently. I only recently discovered these frustrating puzzles, but according to the Wikipedia entry on Sudoku, they've been around since 1979.
4. Poker chip tricks have also been eating up my time of late. Note there are different ways to do poker chips tricks.
5. 12-sided calendar: print and construct your very own dodecahedral calendar.