Thank you for viewing! ⭐️ No comment needed, instant purchase OK ⭐️ We have a follow-up discount, bundle discount, etc., so please comment. ⭐️ If you have any questions, please contact us before the [evaluation] of receipt. Let's play like an engineer today. A growth toy with the three elements of "thinking, moving, and fixing." Children experience turning screws and bolts and changing shapes while using actual tools, which greatly enhances their "ability to understand structure" and "ability to grasp cause and effect." It's especially popular with boys, but anyone who likes to play with their hands will be fascinated. Take the first step in manufacturing at home. (Notes) * Please note that we will take it out of the box and send it wrapped in cushioning material such as bubble wrap.