Useful sites

                
Siti utili:
Mathematics:
http://www.googolplexwrittenout.com/
-100,000 Digits of Pi (π) in 5 minutes:
https://www.youtube.com/watch?v=NBKeK4_3_Hs
Science:
-Instead of TV:
http://unplugthetv.com/
Chemistry:
-Dynamic Periodic Table:
http://www.ptable.com/#Orbital
-Periodic Table of Periodic Tables:
http://www.keaggy.com/periodictable/
Evolution:
http://cubes.io/
Demonstrations of physics, chemistry and other stuff like that:
http://freezeray.com/index.html
https://phet.colorado.edu/
http://falstad.com/ (the best)
http://minutelabs.io/
Art:
-Quick, Draw! Recognize drawings:
https://quickdraw.withgoogle.com/
Games:
http://www.bubole.pl/#/en/
http://llerrah.com/cattrap.htm
Random:
http://insultme.co.uk/
http://popopopcorn.com/