The Sensory Genius collection allows busy hands to be productively active so the mind can focus. When you're tied up in knots, stretch away the stress! These squishy strings can stretch over 3 feet long and be twisted and twirled around your hands and fingers for uniquely satisfying stimulation. This quiet activity builds finger, hand and arm strength while relieving tension in your neck and shoulders. Each pack includes 2 Stretchy Strings.