Dance Mat Typing from the BBC
Other possibilities:
- Burning Cargo - fun!
- TypingWeb.com
- FunToType.com - includes Clockwords: Act 1 game
- Keybr.com - practice with real (or nonsense) words and texts
- The Typing Playground aka freeonlinetypinggames.com
- Keyboarding Games from learninggamesforkids.com
Haven't tried yet:
