PRACTICAL INTERESTS (CHILDREN'S / TEENAGE). So you want to build your own aircraft models? Real ones that you can power and fly? Well now you can, with How to Build. Inside you'll find simple instructions, equipment lists and templates to help you make working models, including a hot-air balloon, hammer glider, Bernoulli glider, roto-copter, rubber-band aeroplane and a catapult glider. This series is aimed at budding inventors and engineers of the future, and contains builds which require adult supervision. It supports design and technology skills and learning, and is ideal for use at home, school and at STEM clubs. Ages 9+