50074 Blocks'n'Knots Bird Toy parrot cage toys cages preening cockatiel conure 50074 Blocks 'n' knots bird toy for those small and medium sized feathered friends that like a bit of destruction in their lives. Three square blocks of corrugated cardboard are strung and knotted together with a colorful array of soft cotton rope, giving your companion an array of healthy chew and preening activities. It measures approximately 9 inches high by 3 1/2 inches wide, comes complete with a quick link for easy cage placement.