SonicDad.com The site is run by three Dads, who have created 61 (and counting) do-at-home Man Toy projects. Things like mini crossbows, binder clip catapults, golf ball tops, paper airplane launchers. You get the idea. Best of all, these projects are made from inexpensive things you probably have around the house already!
The most basic projects - SimpleSonic projects - are free. To get plans for the others, you need a paid subscription ($3.99 for a single project of $24.99 for a year of use), but at the very least, you can get some great ideas from some very creative Dads!
(These pictures are taken directly from SonicDad.com - check them out for a whole lot more!)