My bun loves anything that he can chew on! I've come to realize since I found this forum that can be pretty cheap too. For instance, and cardboard box that I already had around the house. He is going nuts tearing it to pieces; he's so happy he's even binkied! On his pen I have a metal stick that has different chew blocks on it, and I can change them when I want. It has a bell at the bottom and he likes to ring that too. He also likes to dig, so I often get him these hay mats, and he digs and chews on them. :biggrin2:
EDIT: Here he is with his box, it's much more shredded now though.