We didn't know that there is this thing called a hamster ball. Just put the hamster in the ball & let it roll around anywhere in the house. Don't see hamster small small, but they can really run & roll fast! Till a point where we played MJ & we lost track of Hammy! Kan cheong kan cheong, we quickly went to search every corner of the house, hearing out for the plastic ball sound. Finally I found him at a corner in the toilet! hahaha.... it was actually quite fun like hide-n-seek.