Everyone stands in a circle, puts two hands in the air and closes their eyes. Afterwards the players walk towards each other and try to grab another hand with each of their hands. Everyone opens their eyes again and now the trick is to untangle the knot by climbing over and under each other.
There is a variation where everyone makes a fist with their left hand and keeps their right hand flat. Now you have to find a flat hand with your fist, and vice versa.