The core concept is to create an item which can be interactive for both the owners and their furbabies. This interactive scratch wheel is designed with rail-like spaces to accommodate multiple balls with interior bells. The surface is spacious and the center is embedded with a circular scratcher. Your furbabies won't be able to resist the sound of the interior bells bouncing within the inner walls. Excellent for scratching and clawing, great as a resting area, and irresistible as a toy. Up to 2 styles and patterns are available for the cover.