Have you heard of the game of Amida? It seems to be unknown in Europe, but in Japan is very commonly used as a method for drawing lots. It also provides an engaging example of a one-one correspondence which may be useful to teachers in several contexts.

The procedure is as follows. The adjudicator draws on a sheet of paper a sort of compound ladder consisting of a number of uprights, one for each contestant, joined by horizontal rungs, in such a way that each rung joins a pair of adjacent uprights, and no two rungs have a common endpoint on an upright (Fig. 1). Subject to these rules, the adjudicator may place the rungs as he pleases, and as many or as few as he likes, even none at all.