Most of you most likely have a pack and play or a crib. If you have little ones see if you can get your hands on some of these plastic balls. I have seen them at Walmart. If you don't have balls see what else you can find that would work. Foam blocks or anything somewhat soft. Fill the pack and play or crib with the items of your choosing and let your little ones (one at a time for safety) play, dive, jump, and have a blast in the balls.
They will love it I promise!