This is an amusement prize. I opened the box, but I couldn't figure out how to assemble it, so I've been storing it at home. The back cover of the instruction manual is torn. The box is also slightly torn and creased. The parts are unopened. Although it is unused, please refrain from purchasing if you are concerned about minor imperfections. 【Unique Hydro Power】 This hydro-powered construction vehicle operates using the power of water. It is environmentally friendly and energy-efficient. 【Enjoyment of Assembly】 As a DIY kit, it offers the fun of assembling it yourself. It's enjoyable for both children and adults. 【Educational Value】 This kit helps you learn the basics of mechanical engineering and physics. Understanding deepens by creating a model that actually moves. - Product Name: Hydro Power Construction Vehicle - Type: Bulldozer - Contents: Assembly kit, instruction manual, parts bag - DIY: Kit to assemble yourself