Monthly Hall Game:
http://math.ucsd.edu/~crypto/Monty/monty.html
What are the chances
http://nces.ed.gov/nceskids/chances/
Probability Fish Tank
http://www.bbc.co.uk/schools/mathsfile/shockwave/games/fish.html
Rags To Riches
https://www.quia.com/rr/579015.html?AP_rand=655470733