I put the tempera disks into individual holders, and filled them about halfway with water. Students were instructed to use the water only, not actually touch the disk with their paintbrush. They used a large brush to paint all over the eggs. When they were done, the eggs were cut out, and mounted onto pretty paper!
This is a wonderful project that took less than an hour to do - perfect for a sub, or just an easy project to reward a class!