I don't know if you'd consider it a toy, but I always thought building one of those spinning LED clocks would be cool. I think there was something like that in a recent issue of N&V. I've even seen them as caller ID's. I always thought it would be cool to have one of those for my desk at work, so if I was at a meeting or away from my desk, the person looking would know. Maybe have the ability to program messages like "In a meeting", "Will be back @ 12:30", or "On vacation". I know I'd buy one.