Travel smart with the CritterTrail Off-To-School home and carrier! This multi-purpose bus includes real rolling wheels for playtime after a long day of class. When parked, the Off-To-School connects directly to any CritterTrail home providing critters with extra living space. Flip up the built-in handle and CritterTrail Off-To-School graduates into a carrier! Universally connectable, easily attaches to all CritterTrail, Habitrail and S.A.M. systems.