My bun (super lazy) loves his treat ball and his logic game they involve food, so maybe also Caroline may like them?
Links for products I am using:
ball: http://www.zooplus.it/shop/roditori_piccoli_animali/giochi_trasporto_roditori_conigli/giochi_furetti/98739
logic game: http://www.zooplus.it/shop/cani/giochi_sport/occupazione/giochi_occupazione_cani/347554

I’m sure there are other brands that make these, they’re very popular with dogs. I wouldn’t know how to perfectly describe them, so I just slapped the links there I do remember seeing the Trixie game on Amazon.com, though.

Anyway,I fill them with pressed hay pellets and K entertains himself for a while.

Posted By Muchelle on 3/03/2018 12:20 PM

I’m sure there are other brands that make these, they’re very popular with dogs. I wouldn’t know how to perfectly describe them, so I just slapped the links there I do remember seeing the Trixie game on Amazon.com, though.

Anyway,I fill them with pressed hay pellets and K entertains himself for a while.

Luna has that one! (the U.S. version) She goes absolutely nuts. 

For a bed, I got a piece of fake sheepskin and my bunny like to sleep on that, and also play with it. I originally put it in a basket, for a better bed, but she seems to like to play with the basket and sheepskin separately. I don’t know about back problems in rabbits, but I do know that humans are far more prone to that than other animals, because of being bipedal. So much pressure on our spines that most animals don’t have to deal with So this is one case where you might not want to project – she’s probably fine.

It’s hard to say what your bunny would like, but has she tried a tunnel-type toy? Mine loves everything about tunnels.

Pellet ball? It’s free to make and you can reuse it!

http://www.instagram.com/p/BgJD60YB9RM/

This is one of Luna’s tunnels: https://www.petco.com/shop/en/petcostore/product/leaps-and-bounds-crinkle-cat-tunnel

I have the iKea doll bed for Alfie, I put a few fleece blankets on it and he likes to hang out all day on it. I live in the US too and a toy that my bun loves is the Teach n Treat by Living World. The levels aren’t too difficult, but it keeps him entertained and slows down him inhaling pellets. I also get a lot of toys off of Etsy. Some of my favorite sellers are Bunderland and ButtercupBunBoutique. I will also second that tunnels are great for exercise, my bun might be the laziest ever but he’ll always zoom through his tunnel when I put it out for him!

Yeah, I just got the tunnels from pet stores (in US). My bunny and I like the one she is sitting next to in my profile pic. She really liked one coated with alfalfa, but I had to throw it away when she started swallowing the cardboard underneath, too. The wood ones are sturdy enough for rabbits to sit on (weird?) and rough enough for them to want to chew. It’s all purpose rabbit furniture, since she exercises around it, stands on it, and sleeps under it

https://www.amazon.com/Kaytee-Tropical-Fiddle-Sticks-Hideout/dp/B000HHO26E/ref=sr_1_8?ie=UTF8&qid=1520997725&sr=8-8&keywords=pet+rabbit+toy+logs

You can buy this at a lot of stores – this is just one example so you can see the product.

Rabbits can have nibbles on cardboard. I give mine cardboard toys all the time. As long as they do not eat to much its fine.

Sure, that’s true. But when my rabbit was growing she went through a billy goat phase where she started eating large amounts of the cardboard and paper toys I gave her. It interfered with her eating real food and she actually lost weight. Apparently most buns don’t do that, but mine did for whatever reason. I got rid of all her access to cardboard at the time. We are working our way up to her being trusted around cardboard again, now that she has better eating habits