This large bird toy is made of mostly plastic parts that move, spin and wiggle. Everything is hung with chain and a wide jaw quick link. There are lots of mini nuts and bolts to unscrew, as well as three stainless steel nuts and bolts with wing nuts to unscrew time and time again. We have put lock nuts on the bolts so your bird cannot remove them, but if you want your bird to be able to remove them, simply remove the lock nuts. It also has two colorful baseballs and one large softball, along with refillable plastic links with bird bagels on those. Lots to do on this great bird toy! A plastic lovers dream for sure!