I don't do store bought toys, but do give cardboard boxes, toilet paper rolls stuffed with hay to help my bunnies with their chewing needs. Plus it keeps them from getting bored which then leads to destructive habits. I found these things useful when I first got rabbits and they were in a wood chicken coop. I've since gone to wire and plastic crates, but found when one is bored they will try to chew on the wire so the cardboard and hay filled rolls do keep them busy. Plus the straw mats do wonders too. They have a ball digging on it and chewing it up.
Karen