Original Design - When the designer of Robotime considers the time it takes to craft this item as well as the enjoyment he gets in putting the pieces together. It will work once completed, good qulity. . Easy to Build- It comes with plywood panels, 32 pieces of wood need to be assembled. English illustrated instruction, easy to follow and put pieces together. . It takes about 1-2 hours to complete, suitable for 14 years old and above boys and girls. Younger children may need parental help. Laser Cutting Technology - We adopt laser cutting technology for this item, smooth wood surface, no burrs, safe for your hands. Wooden material, non-toxic, safe for your kids to build and play. .