Nonaka Seisakusho Wood's Ride-on Boo-Boo Wood's Ride-on Poppo Wooden Push Cart The backrest can be removed by unscrewing the bottom screws. The horn makes a sound when you press the tube on the handle. It was used indoors, but has been stored at home for a long time. It's old, so there are scratches, worn rubber on the tires, and deterioration. The tires feel rough to the touch. The packing on the rear left wheel has come off (photo 20). Please understand that this is a used item stored at a private residence, and consider this before purchasing. Thank you.