You may be able to take a picture of your cat playing! The keyboard part of the piano is sharpened by a nail "Nyanko Grand Piano" The sound of sharpening your nails on the keys of the piano sounds as if you are playing. Once the nail sharpening is over, go inside and take a break. There is a paw-shaped peephole on the roof, so you may be able to see the eyes and hands of the cat inside! For bonding cardboard, a natural glue made from corn is used. Since it is a natural material, it is safe to lick your hands and paw pads.