Yuk-E-Balls are among the most tactile, oversized balls to hold and their weight provides great kinesthetic feedback. Yuk-E-Ball’s seamless PVC shells are durable and filled with ¾ inch diameter PVC balls in a non-toxic gel. This combination of materials creates a fluid environment, within which the PVC balls glide easily when squeezed. Ideal for special needs therapy. Sold as a single unit. Assorted colors, sorry not color choice.