Harrison, Slater.
Putt Putt Boats
. Retrieved June 28, 2004 from the world wide web: http://www.sciencetoymaker.org/boat/index.htm. This website gives great instructions on how to build a putt putt boat.
http://www.sailnet.com/collections/learningtosail/basics/orientation.htm Great drawings of a sailboat with explanation of different parts.
http://travel.howstuffworks.com/steam1.htm A website with great illustrations of steam engines and how they work.
http://www.brainpop.com A great site with small movies about different principles of science and technology. Be aware that you can only run two movies per day if you do not have a subscription.
http://boatdesign.net/gallery/ A site with great galleries at the bottom which show boat plans as well as three-dimensional designs of each boat.
http://www.keveney.com/Engines.html A website with great moving illustrations of different types of engines.