We have a super cool light up ball. It flashes and vibrates and makes a huge racket. The kids love to take it into a dark room and pass it around. Alice just grabs it and stares at it hyponotized(I couldn't get a picture of it) and Juse just holds it and laughs. It is a super fun sensory activity, not to mention it makes some really cool pictures on the firework setting of my camera.