Taking a trip in the way back machine, some parents may recall the stacking toys we had when we were young. You know the primary colored plastic rings. A good toy but Infantino believed it was one that could use an update. Back to the present, Activity Stacker demonstrates that change is very good. This plush toy (no more plastic) both entertained and stimulated all of the senses of our baby testers. There is a textured teething ring (which can be frozen), crinkly rings, a bead rattle and lots of surprise noises to elicit smiles. The early development of eye/hand coordination was not lost on Moms and Dads who gave top scores.