A ponte de Leonardo

http://youtu.be/HuCEpvAKx5o

http://www.youtube.com/watch?v=xdvRdDg5jKY&feature=fvwrel

http://www.mathartfun.com/shopsite_sc/store/html/LeonardoSticks.html

http://www.rinusroelofs.nl/structure/davinci-sticks/gallery/gallery.html

III día da Ciencia en Galego