"How to make tin can toys" is a $9.95 ebook version of an old book explaining the fabrication of all manner of toys from tin cans. Judging from the table of contents, it covers a lot of basics, from soldering to tool-use, and has projects for making cars, trucks, boats, trains, as well as several mechanical toys, including a steam turbine and boiler.
Update: Thanks to commenter Corvinus for pointing out that this public domain book can also be legally downloaded for free here.
(via Making Light)