Review on 🔩 The Ultimate Rotating Mechanical Constructor for Engineering Enthusiasts: Perfect for Adults and Teenagers by Chuck Derrick

Fascinating assembly. This is a simple model. It's great that it uses a solar panel or 2 AA batteries. The guide is easy to use. The kit includes everything you need to assemble, such as candle wax, glue and sandpaper. Although batteries are not included. Use candle wax and sandpaper often! This will help! The battery cover is very fragile. When switching from solar to battery, you need to disconnect the cable from one power source to the other. If you use a solar panel, it must be taken outside in direct sunlight. Sunlight does not penetrate glass. Overall worth the time and money.