Included for a bit of cultural diversity: MR2198856 (2007c:60074) Robinson, Thomas(1-RTG); Vijay, Sujith(1-RTG) Dreidel lasts O(n2) spins. (English summary) Adv. in Appl. Math. 36 (2006), no. 1, 85–94 The list of references is also worth checking as it has some more elementary accounts.

Not sure how often it is played, but let me include it for a bit of cultural diversity: https://en.wikipedia.org/wiki/Dreidel MR2198856 (2007c:60074) Robinson, Thomas(1-RTG); Vijay, Sujith(1-RTG) Dreidel lasts O(n^2) spins. (English summary) Adv. in Appl. Math. 36 (2006), no. 1, 85–94 The list of references is also worth checking as it has some more elementary accounts.