Everybody knows how much fun it is to shake Christmas presents. I had an idea of adding a simple project into somebodies present, so that when they picked and shook it, it would yell out "Don't shake me!". The look on the person's face would be priceless. I haven't tried to think what this would take, but it shouldn't need much more than a ball & tube tilt sensor (or accelerometer), a very small voice playback engine, and a speaker.
Anybody ever tried something like this?