My mom has these and swears by them but I'm not a believer myself. My 9 month old loves to chase after them at Nana's house so maybe they weren't a huge waste of money.The ones I saw were two in a package. They looked like hard rubber balls with little spikes all over them. I think the kiddo had a toy similar a few years ago. They are suppose to replace fabric sheets in that they beat the clothes into soft submission I guess. Also I heard they speeded drying time. I am not sure about them though.