The move & groove is a baby box set developed to encourage fine & gross motor skills. Suction cup The Rainbow reel to any smooth surface, and baby can bat at the wheel, a developmentally appropriate skill at this age. The spinning wheel reveals a rainbow of mesmerizing colors. The 2 mini-shakers are the perfect size for baby to hand grasp and shake. The bumpy ball has chunky sized bumps to encourage reaching, grasping, and transferring from one hand to the other.