My goffin's cockatoo's name is Bogie, and she has to be one of the hardest playing birds I've ever had. This toy is packed with all her favorites. Some old toy parts and some new toy parts. There are sixeteen strands of poly rope with over 120 parts. It has chewy plastic race cars, chewy plastic sea animals, balsa wood shapes, flying saucers, chewy pastel rings, chewy plastic keys, and our all NEW exclusive loaded golf balls. We have inserted pine nuts in each golf ball for your bird to have to forage for. Also, the knots on the bottom don't appear to be hidden, but there are others hidden inside the golf balls, so if they untie the knot at the end of the golf ball, they still cannot get it off.