Bests & Worsts Reviews from Amazon

Got this one for my son, to help with stacking. He has special needs and stacking was one of the areas he was struggling with. During his OT they used a variant of this stacker with a lot of success, so while I was still at their office, I ordered one. So far, so good. He likes it, specially the red ring with yellow dots. He also liked the one with the beads inside. The rings are made out of plastic and appear to be durable. Update: They are very durable. Over a year has passed and they are still going strong.