You can buy egg-shakers at most music shops. I was dropping my sister off at the dentist today, and while the receptionist was in the back of the office making a copy of her insurance information, I stole one of those plastic fruits they had sitting out for show. It looks just like a lemon and is hollow. I'm going to make a musical shaker out of this. What should I fill it with? Glass micro beads Dried rice Sea salt Other suggestions?