We had the Butterfly Habitat and ordered our caterpillars from Ribbots Galore http://www.ribbitsgalore.com/ a couple of months ago.
Well....Aiden kept asking me EVERYDAY when his caterpillars were coming. He was so excited to see them. Well, we all were. So they soon arrived and we placed them in the habitat as soon as they went into their chrysalis:
Definition of CHRYSALIS
a) pupa of a butterfly; broadly : an insect pupa
b) : the enclosing case or covering of a pupa
Within a couple of weeks the adult butterfly came out and flew around the habitat until we set them free.