|Knot So Fast
A three foot piece of string or rope
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!,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 in the middle of the string!