Q&A for How to Make a Modular Origami Stellated Icosahedron

Yes. In fact, you can hide something small inside of it, but make sure it's not something too heavy to avoid having it break through.

That depends on the paper you use, how well it's folded, and how well it is put together.

Nope, it can be smaller or bigger, but the smaller the paper, the harder it is to fold all the pieces!

Follow the instructions. As it says, you should use three different colors for each pyramid.

Cut the paper into a square, or follow the tutorial on how to make origami paper. An icosahedron will not work with a rectangular sheet of paper, because your modules will not have the right folds on them, and the modules will not turn out like you want them to.