Corda o spago

Would you like to have your own phone?Follow these simple steps to make a telephone out of rope or string by joining two empty cans or two plastic cups.This article is also a valid starting point for a scientific experiment on sound transmission.

This is a fairly simple knot, which can be used to secure tops to trees, poles, or other vertical things.Furthermore, it will also be easy to adjust the length of the rope, in case you need it.It can be used for harnesses, anchors and even in sailing, especially as a temporary method of securing something.