A new (temporary) pet!

Meet Ziggy Stardust!
Yesterday the boys and I went for an afternoon walk, and as we passed a few milkweed plants, I spotted this monarch butterfly caterpillar.
About a year and a half ago, I read an article in some magazine about a mom who finds monarch eggs every spring and raises butterflies with her daughters. I thought it sounded like a neat idea. Then I saw an episode of Jon & Kate Plus 8 (pre-train wreck) where Kate and the kids were doing the same thing. Again, I thought it sounded like a neat thing to do.
So, we picked the milkweed leaf, named the caterpillar Ziggy Stardust, and now he's living on our counter in Logan's Bug Box. He was in a plastic grape container but escaped last night so we needed to find something more suitable.
I'm not sure if he's happy though. He is hanging out on the top of the box (inside) and I don't know if he's trying to get out or if maybe he's preparing to make his chrysalis. We'll see, I guess.
Anyway, it will be a fun project if we can manage to "grow" a butterfly!