The selections on these pages are some of the less dangerous projects from an ancient two-volume book set called, The Boy Mechanic. Unlike the more recent, "Dangerous Book for Boys," some of the projects in these books are really dangerous... at least if you consider molten metal and explosives and such to be dangerous. However, though they are very dated, some of the projects still look interesting and helpful.
I've included several that stood out to me. I've tried some and they work; one that doesn't; and some I don't know at all. Anyway, you are completely on your own.
“Since the fall, God will not trust us with our own salvation, but it is both purchased and kept by Christ for us, and we for it through faith, wrought by the power of God.”
–Richard Sibbes, The Bruised Reed and Smoking Flax