He invented so many things, war machines, for industry, gadgets and science tools! Even Wikipedia doesn't have a list as such, but heaps of material and external links en.wikipedia.org/wiki/Science_and_invent... Here's a cool quote about some of his inventions from here: mos.org/leonardo/inventor.html .../quote "once he started on the subject of water te(sic) couldn't really stop, forever envisioning things like floating snowshoes to walk on water, breathing devices (including a diving hood) and webbed gloves to explore underwater, a life preserver to remain afloat, devices to attack and sink ships from underwater, and an "unsinkable" double-hulled ship and dredges for clearing harbors and channels. " .../unquote This About article has a very good gallery of the drawings of the inventions plus a little bit about them - categories include machines to storm walls, a giant cross bow and the famous ornithopter flying machine - like a modern helicopter wow!
inventors.about.com/od/dstartinventors/i... For kids and fun adults - a neat little game to play to learn all about his inventions mos.org/sln/Leonardo/LeosMysteriousmachi... And check out this video about his inventions: metacafe.com/watch/855385/inventions_of_... Flying machine image by zinesklavos flickr.com/photos/zinesklavos/2317179293/ Argh! A Scythed Chariot and a Tank-Like Vehicle http://www.flickr.com/photos/zinesklavos/2326054756.
He invented a lot of things like: 1. Glider 2. Helicopter 3.
Parachute See corresponding images of #1, 2 & 3.
The Viola steam-powered cannon Codex on the Flight of Birds light hang glider but there is more information on the following website, a lot of his inventions were geared toward military techniques and arms. en.wikipedia.org/wiki/Leonardo_da_Vinci#....
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.