Worry Dolls are little people created out of different coloured string tied together. Most of the time, they range from tiny to about an inch in height.
To make them, you start by getting short, thin pieces of wire and wrapping them around each other until you make something that looks like a stick figure, then you proceed to wrap the string around the wire until it reaches sufficent thickness.
Known to alleviate stress with some people, also makes a good craft for little kids needing something to do.