Tickle is a small robot that walks on the human body to generate a pleasant, tickling sensation.It has two motors and rubber feet for a good grip on the skin. When it encounters a slope that is too steep, it will steer until a safe level is found, and it will continue its way. Tickle has been awarded with a first prize in 1999 at LIFE 2.0, an international competition on Art & Artificial Life. In the current version the technology has been renewed, to improve its movement behavior. Created by Erwin Driessens & Maria Verstappen and currently on display at the Bios4 exhibition in Spain.