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

A well designed and solid puzzle. Easy enough for 10-15 year olds to assemble. The instructions weren't the best, but you don't have to be a rocket scientist to figure it out. The problem is that the solar panel is not working. We gather everything together, but the windmill doesn't move. Motor connected to the battery and everything worked. When I checked the voltage from the solar panel, the arrow just trembled. Definitely not enough juice to power a windmill. If you like windmill puzzles, buy it. If you expect it to move as advertised, don't waste your hard-earned money. I would send it back, unfortunately we have already disposed of the packaging.