The adventure bound 32cm block rock bird toy has been created to stimulate and challenge birds of all sizes made from all natural materials this toy has been fully tested for safety the block rock is the perfect toy for small birds that need to wear down sharp edges on their beaks and claws keeping them healthierit features a selection of highly porous rocks that are set in between two pieces of hardwood with a strong metal chain threaded throughthe rocks are great for birds to grab hold