The Boy Mechanic Vol. 2: 1000 Things for Boys to Do Chest of Books presents free online books on a variety of topics. This 1948 Popular Mechanics publication is one of hundreds available online. Summary:

How to construct devices for winter sports, motion-picture camera, indoor games, reed furniture, electrical novelties, boats, fishing rods, camps and camp appliances, kites and gliders, pushmobiles, roller coaster, ferris wheel and hundreds of other things which delight every boy.