Try the Monty Hall simulation below. If you need more background about what the Monty Hall problem is, begin here. If reading is not your thing, watch this YouTube video.
Note: set the number of iterations to 1000 or lower. It will work with any number, but you'll be waiting a long time with larger numbers.
Chebyshev's Inequality next - here's information about what it is.
Roll a pair of dice next!
A simple way to "get" regression