Description   Introduction:   Humans all have a dream of exploring space, and we need to cultivate this dream. We have been working hard to explore this dream since childhood, starting from the chassis of the lunar exploration tank.     Scientific knowledge points:   1. Principles of Tank Movement   2. Motor motion principle   3. Basic Mechanics   Product features:     Building block assembly toys 3-9v wide range voltage TT motor has strong universality Affordable Multiple circuit boards can be installed Apply adhesive to fix the welding position of the motor for easy reuse Parameters:   Product Name: Lunar Exploration Upgrade Acrylic Fully Assembled Tank Chassis   Model: SNX1   Weight: 399g   Color: Transparent   Size: 20.5x16x7Cm (length, width, height)   The track has a width of 4.5 centimeters and can be disassembled in length, with self provided tools   Assembly instructions: We have a small screwdriver that can be assembled, and the motor wire has already been welded Shipping list: A set of tank chassis components Precautions: 1. The shipment is loose and requires self installation 2. This product is a patented product and does not provide design drawings