I've bought Larry Bird tons of toys, but the ones he likes best are his paper cups

He chews on them, loves on them

, and places them lovingly in different parts of his cage. "You belong here. No... over here! Nope, nope, over here! yeah, that's it!" Larry might be partial to them because he was hand fed using the cups in place of a syringe, but they're inexpensive, so I'd recommend giving them a shot!