Scone's favorite toys are the simplest - an old cardboard box or toilet paper roll - no need to do anything to them. If the roll is stuffed with hay, that's pure heaven. He can eat the hay, and then chew the roll to get at more hay.
A fresh apple twig straight from the tree is also in the top ten bunny toys, and if it still has leaves on it - or, even better, flowers - that's even better. (Twigs from most other trees are fine, but dry them first. Don't use cherry twigs, they're poisonous)
In the winter, a roasting pan full of snow can provide lots of digging fun.
If you've got a paper shredder, fill a box with the shredded paper strips.