What should you put in a catapillar's cage?
First, line the top of the cage with cheesecloth, for when it is
ready to build its cacoon. Then, put a few woodchips (NOT ROCKS!)
into the bottom, in a corner. Then put leaves, flowers, and
non-thorny or prickly items into the cage. Put a few branches
leading to the top so they can climb up to make their cacoon. Also,
cut a small corner off of a sponge, and put a little bit of water
on it, that way, the caterpillars have a nice drink.