They were pastel colored foam rubber balls, usually green or pink, about the size of a softball. There was also an accessory, sold seperately, a small basket ball hoop that had two suction cups attached at the back that could be stuck on a flat surface such as a wall or a door (usually doors). NERF basket ball became a popular indoor sport. About the only place I see them today are at video stores who use them for customers who would like to 'shoot to win' for a free movie rental. Foam balls that came in different colors. We used to play with them when we went swimming -- let them soak up water, then throw them at each other!