Race of the Knots

Sit everyone in a circle. Prepare two shoelaces (or strings). Give one shoelace to one person and instruct that person to tie and untie the shoelace and pass it on to the person on the left who does the same. Give the other shoelace to someone three persons away (to the right). Instruct that person to make two knots and untie the two knots and pass it to the person on the left who does the same. The person caught with two shoelaces losses and has to perform a consequence.