This beautiful wood interchangeable set is perfect for Summer! You can purchase the wagon/ shelf sitter and the insert set separately, or together at a discount. If you already have our interchangeable wagon or shelf sitter then you will only need the insert set. Wagon portion measures 12.5” long x 2” deep x 4.75” tall . Shelf sitter measures approx. 13" long x 4" deep x 6.25" tall. Everything is made of wood and painted or stained.