Anything that makes noises that are loud enough to wake you up seem popular with mine (he sleeps in my room, I don't sleep :lol
I don't know if your buns into cuddly toys but Ferg has a p@h burger and donut dog soft toy (squeakers taken out) that he LOVES. He snuggles them, licks them and rolls them... And throws them in his water bowl
And toilet roll tubes are excellent bunny toys, I've started cutting one into a spiral and filling it with hay and he loves eating out of it and throwing it so that's a nice one
Cardboard always seems a favourite