Helping Daddy rake the leaves and clean up his garden, the trio spots a roly-poly! When they go to pick it up and get a better look, the funniest thing happens. It rolls up into a little ball. Why do roly-polies do that? Is that just their way of playing? What’s happening here? They soon find more roly-polies to observe and examine, but to really learn all about roly-polies, Luna, Jupiter and Clyde decide to make believe they’re roly-polies too.