Ferret ball pit made from plastic Easter eggs. The eggs are also great for balls to roll around when you put beads or beans in them. It'd be cool to put snacks in them too, so the ratties would have to rummage a bit.
Keeping your fuzzy ferret entertained doesn& have to cost you an arm and a leg. You can make a lot of toys yourself that are much cheaper than what you find at the pet store. She needs toys to .