S15E13: Leather Wallets, French Horns, Soy Sauce, Children's Ride-On Cars

Leather is cut, thinned, lined and stitched into wallets with precisely fitted pockets and compartments. Brass tubing is bent, joined and equipped with valves and a flared bell to create French horns; fermented soybeans and wheat are aged, pressed and filtered into soy sauce; and moulded bodies, electric motors, batteries and controls are assembled into children’s ride-on cars.