Stacking Rings Learning Toy by Sassy , 9 Piece Set, Age 6+ Months

The Stacks of Circles make attaching rings more enjoyable than ever before! Each ring's core is the same size, making it possible to stack them in any orientation without becoming stuck, which makes for a fun game. By introducing young children to sorting, sizing, sequencing, and constructing, The Stacks of Circles encourages early STEM learning.