Leonardo da Vinci for kids

There are lots of great resources for us on our current artist, and I want to be sure and highlight such a notable man in history for my kids. Here's a six-page pdf with links and activity ideas; a link on painting birds as he did; a History channel video on The Last Supper; an online portrait-maker in the vein of da Vinci's portraiture; a great collection for teachers and students of the best sites on da Vinci; a Mona Lisa art activity; the BBC's Leonardo page; the first of 18 BBC videos on the man (no, I have not watched them).