Happy Senso is a gel with multisensory properties. The intensity can be varied by applying it in different ways. You can hear, feel, smell (neutral has no scent) and see. It also has a cooling effect on the skin. A fantastic product for sensory stimulation. It is fun to use and provides eyes full of brilliance and enthusiasm and beautiful contact moments. Happy Senso is of very high quality and has been dermatologically tested. Highly appreciated by occupational therapists, physiotherapists, remedial therapists and speech therapists.