Also a game played by bored english schoolkids, brownies, boy scouts, and anyone else in an after-school club.

You sit round in a circle and assign a number to each child (for it's usually children who play this). You then tap twice on your knees, click twice (once with each hand) and say (while tapping)

Concentration: are you ready: if so: let's go. You speak on the knee taps and not at any other time.
Then person one goes 'one to two', two goes 'two to five', five goes 'five to n', n goes 'n to whatever' and so on.

It sounds very confusing, but if you miss your reply or hesitate (in the same manner as Mallet's Mallet) then you're out and you lose. I am not sure how you determine the absolute winner, as when there are only 2 people left it must get fairly easy. Perhaps someone could enlighten me on this.