Grimm's Concentric Circles and Rings can be used on their own or in combination with many other building sets.
On their own they can be used for colour sorting, rolling or as a floor puzzle.
One of our favourite ways to use them is with the Small Stepped Counting Blocks to make a spiral marble runs. They can also be used together to stack tall towers, pictured below.
Details:
Set of 20 pieces.
Made from ply wood and finished with a non-toxic water based colour stain.
Size: diameter 2-20cm
Recommended for children ages 5+ years.