I gave my bunny Murphy a carrot chew toy when he was a couple months old, but he just wanted the real thing!
This is Morag. She seems to think she's a cat, and indulges in many cat-like activities, including trying to get into the cat food and litter box. She prefers wandering about the apartment to swimming in her tank, which has a ladder for her to climb in and out by. Here she is sitting in the window.