Our timneh greys' (knuckles and baby) love our fried chicken wood, so this toy is perfect for the two of them.  Twenty jumbo 3" long skinny hardwood dino bones and fried chicken cactus wood all knotted to our avian rope.   Very simple.. but a load of fun to munch away all day. Also available in an  itty version.   12" long and 3" wide.