I would love to see what he's building for you! I want to figure out a way to let our rabbits get out and enjoy the grass this summer! We have an extra large dog crate that I think will work, but I would like them to be able to have a bit more room to run around. Daphne doesn't move much and she needs too. Buck is always hopping around in his cage. They have quite a bit of room, but they need some grass time! Neither one of them like being handled too much, so I have to wear gloves and long sleeves. They don't bite, but their nails are pretty sharp!