  There are a lot of new sciences that have been inspired by common phenomena
and even by old traditions practiced in our daily lives. Eventually, it may
induce unexpected new technologies after deeply explored. In this paper,
inspired by the wearing of traditional cloth, named sarong, by the community in
the South East Asian countries and others, we investigated the behavior of
sheets folded like rolling of sarong around the stomach. Simple equipment was
designed to qualitatively collect the data and combined with simple modeling.
Rolling of the sarong around the stomach generates the joining force of two
sheets, increasing proportionally to the square of the number of rolling. This
finding is potentially applied for developing a method for strongly joining
sheets by simply rolling and releasing the join by simply unrolling. This work
can also be simply duplicated elsewhere so that it is worthy of teaching
materials at undergraduate levels. Both scientific and teaching contents can be
extracted simultaneously.
