Habitrail Ovo Doll House This fantasy doll house can make any hamster jealous. This multi-level house gives your hamster plenty of rooms to explore - watch your hamster through the window opening and see what he's up to. The Habitrail Ovo Doll House is a great interactive toy for your hamster. It features pre-cut slots to hold the food or treats in place. Your hamster will have hours of foraging fun chewing away at the maze in search of the food or treats.