Geckos toes are fascinating little things. They have many microscopic little stalks, called setae, on each toe. At the end of these setae are tiny tips called spatulae that come into contact with whatever the creatures are climbing. These spatulae adhere and release from surfaces due to something called van der Waals intermolecular forces. Basically this means that the spatulae are sized and shaped in a way that allows them to do this. It also allows geckos to support their entire body weight with just one toe.