Teletubbies and Friends Segment: The Magic Hole + Magical Event: Magic Submarines

A magic hole appears in Tubby Friend Land, which sucks Laa Laa's ball in. Now, the teletubbies have to go after her ball through the magic hole. What could be down there? (I do not own anything in this, Teletubbies is owned by Ragdoll Productions and Wildbrain)