The Circle Kit is provided with a set of three circular discs having the different radius. By this kit, a child can explore the concept of circles, concentric circles, circumference of circle and derivation of Pi. This kit helps to understand the relationship between the radius, diameter, and their circumference. It is manipulative that clears the apprehensions about diameter and radius of a circle. These foam circles are durable as also easy for teachers to teach the concepts in the class.