Ring stacker toy is a must for kids. It helps to develop coordination and fine motor skills. With its help, children learn sizes and notions "bigger" / "smaller", "under" / "above", "higher" / "lower" etc. 

Playing with stacking rings is fun: kids build towers, roll them and catch, use as templates for drawing circles. Also, children can use them in imaginative play: rings can be islands, paths, boats, plates, wheels or anything they will imagine.