When going down a large amount of stairs, jump, and have the babies jump off at the peak of your jump. Do this while still moving. The game should slow down when the babies are coming down. If done correctly it should take awhile for them to come down. Note: This can only be done when climbing to the observatory in Princess Peach's Castle (past or present), or in the Past Castle when you are climbing up the staircases in the area shaped like Princess Shroob.