Several members suggest Krylon UV protective spray. Patty cautions that if you are also going to use a varathane coat, the Krylon must go on first, then Varathan over that. She says if you use Varathane first and then Krylon, it will crack. Dominique soaks the egg in vinegar. Dominique advises no, Patty says yes.
Nobody seems to have tried it.
I don't know how old the kids are so I am assumming they are young kids like age 8 on. First of all each kid has in front of them an egg, pencil and a small dish to put egg in so it won't roll off the table. The teacher has a blackboard up and she draws an egg. Then begins with dividing lines showing exactly step by step what to do on the egg. When you have showed them the division lines and then make a star in middle and they followed exactly, then you would have a candle, a kistka and wax in front of them.