If they're all perfectly equivalent then even very young kids will catch on to that quickly. Here's an improvement: make the choices equal in EV but different

If they're all perfectly equivalent then even very young kids will catch on to that quickly. Here's an improvement: make the choices equal in EV but different in variance. That adds a little bit of strategy: take the predictable choices when you're ahead and the risky ones when you're behind. Nonetheless, a child with no concept of this strategy can sometimes win against an adult who plays optimally. N.B.: I was home-schooled through preschool. My mother designed a bunch of board games that she used to teach me basic math. Then I got to kindergarten and got introduced to Chutes & Ladders. I saw through it immediately and got into arguments with my classmates about what a stupid game it was.