Pokeball.

This Pokeball is designed to open. But you will need two springs,a paper clip, and some super glue in order to create this. I simply broke a pen to get the springs. One more thing you will have to scale up this ball an extra 50% in all the parts, in order to make it a bit more functional. And you will have to use some sand paper on the hinge, and drill a 1/16 drill through it semi slowly. That is all the tips i have. Enjoy.