I just came across these...

http://www.nina-ottosson.com/Dog-2.php

I got one that is pretty much identical to the Teach N' Treat. They only had a few models in the store I was in, but I wish I had seen these wooden ones first! They are all made for dogs, so you'll have to deal with the bone motif. I have the actual Teach N' Treat for small animals but the holes for treats are SO SMALL! My lop cannot even fit his nose/mouth in it. These look kinda pricey, but for bored bunnies, might be worth it!