Last week I ordered some egg molds from Japan via Hong Kong and they arrived Friday! The boys and I decided to try them right away.
Here are two in the package:
After hard boiling eggs, quickly remove the shells (don't burn yourself!) and place them in the molds. Then pop the molds into cold water for ten minutes:
They didn't come out perfectly as you can see the shapes weren't well-defined. Next time I'll try larger eggs. Here are the best results: