This clear forager satisfies any bird’s foraging needs. Flower-like curves hold the treats you insert. Your bird spins toy to make treats fall into transparent tube at bottom. You can adjust tube at bottom of tumbler to make it easier or more difficult for your bird. This means once your bird figures things out, you can change it up and keep him guessing. Constructed of clear polycarbonate. Attaches to side of cage. For intermediate to advanced level foraging.