Spinning their Chrysalis, which is a little house they build around themselves as they go through metamorphosis.
Our caterpillars make a "J" shape and then attach themselves to the lid of the cup. Once that is done, they beginning making their chrysalis. They will stay inside for 10-14 days until they emerge.
WOW! It's an amazing process!
We've been busy observing and studying and our brains are sure growing as we exercise it!