Multi-Pet Nobbly Wobbly II Rubber Balls Dog Toys Take a Twist With Nobbly Wobbly II™ Balls Nobbly Wobbly II Balls are made of extra tough rubber, interlaced to form heavy rubber balls. The result is a groovy shape that really rumbles around as it rolls. The bright rainbow of colors in each ball will entice your dogs, and the one-of-a-kind feel will encourage them to toss and chew these funky toys for tons of fun. Available in Small 2.75" or Large 3.5"