I like boats.
Primitive Technology A huge collection of articles and links.
Make your own plastic vacuum former
Popular Mechanics , Many old issues of Popular Mechanics, online!
How to get cheap or free hardwood lumber
Woodgears.ca , An engineers approach to woodworking.
Woodworking For Beginners: A Manual for Amateurs , An old book on woodworking put online.
Chest of Books, home improvement section , Many old books on woodworking and that sort of stuff.
How To Make a Set of Devil Sticks
HOWTO make your own devil sticks
How To Make Your Own Juggling Clubs
Fighter kites are kites that can be fully controlled using just one line. They can be used to hold aerial battles or just for fun.
CyberFighter Website , These two sites above have everything you will ever need to know about fighter kites! Enough said.
Tiny steam powered boats.
Science toy maker - make a ponyo putt putt boat , A simplified design, no soldering required.
Instructables - Pop pop boat made easy for children.
Youtube video , There are many, many, many more.