Decoupage Easter eggs made from paper napkins.The instructions are not here but I believe napkins and modpodge and a little time. I'm think a little sanding of plastic eggs to make the napkin adhere easier would work too!
The gel food Coloring makes this expensive. How to Dye Easter Eggs with Whipped Cream. This is a Great Easter Idea for Kids that you can dye eggs with a Swirl or Marble Look using Whipped Cream which is safer than Dying Easter Eggs with Shaving Cream.