Note: To perform this magic trick, you will need a 3 foot long rope or piece of string.
Challenge your friends to tie a knot in a piece of rope without letting go of the ends. None of them will be able to do it, but you will for sure!
1. Lay the string down on a table.
2. Cross your arms and grab an end of the string in each hand.
3. When you uncross your arms, a knot will appear automatically in the middle of the string!