So [Nikodem] recreated their basic design: strips of thin material wound into a tight spring that forms a tube that can extend and retract. The first prototypes were from paper, which worked but ...

Meanwhile, a roll of green PVC plastic winds its way towards a roller equipped with many circular cutters. They slice it into a four-inch-wide strip. Each of the narrow plastic strips then goes ...

Still available, although with a little bit of searching required are breath strips, a very of its time relic of the 2000s.

When two objects have opposite charges, they attract. Ask your adult partner to use scissors to cut a strip from the plastic bag that is about 3 cm. wide and about 50 cm. long. Hold one end of the ...