I haven't actually got any yet but a lot of people seem to be saying balsa (softer wood?) toys made for parrots are popular with rabbits, anyone know if this is true? (http://www.naturalbirdco.co.uk/ourshop/prod_2206331-Balsa-Cubes-Super-Colourful-Soft-wood-for-Small-birds-9pk.html. I suppose...