If you want to watch your bird go immediately bananas for a toy, you've got to get him a Bird Kabob... but what I am really saying is you need to put this item in your bird budget, because he'll want a steady diet of these messy shredders made from the yucca tree.
The Bird Kabob comes in many sizes and some are even shaped for natural nesting.
Birds love to shred their Kabobs and some do it fairly rapidly. Even timid birds seem to be naturally drawn to it. Macaws are not timid birds, but watch them covet their Bird Kabobs.