For young, old and adult childern, who like menthal arithmetic, i made two games: Additor and Multiplicator. I wish you a lot of fun in play and practice. If you have questions or suggestions, you may contact me through e-Mail.
A couple of years ago, I made here a finance mathematic introduction in options with Black-Scholes calculator for european options, calculator for american options with binomial method and calculator for barrier options with Monte Carlo simulation.
Yours
Ivan Keglević