Sit everyone present around a table so that there are no gaps.
Each person puts their hands on the table so that their arms cross over/under the people either side, so if we have five players, A=B=C=D=E, the order of hands will be:
B-LH, A-RH, C-LH, B-RH, D-LH, C-RH, E-LH, D-RH, A-LH, E-RH
Now decide who is going to start, and which way you will go (clockwise or anti-clockwise). Assuming clockwise for a moment, the starting person taps one of their hands on the table, and then the hand to the left of that hand has to tap, followed by the hand to the left of that, etc. In the above example, this means that if we start with C, and he taps his right hand, the order of tapping must be C-RH, D-LH, B-RH, C-LH, A-RH, B-LH, etc. The tapping must be done as quickly as possible.
If a ‘hand’ hesitates or taps at the wrong time, it is “out”, and the game continues without it.
Finally, a player can decide to tap twice, in which case the direction reverses, and the tap starts travelling around the circle in the opposite direction.