MEGAPLAY Happy Musical Crystal Ring a safe and Smooth surface does not scratch your baby’s skin; This ring will knock out sounds to develop your baby’s sensitivity to hearing. Ability to develop -the sensitivity of the arm, the speed and strength of the stroke, thereby improving the sensitivity of the arm; improving the logical thinking and imagination, and developing the sensitivity of the child to the notes. Our Features bright colour Crystal rings with scent fragrance ,Non-toxic ,BIS approved and ISI Marked. Used as grasping, shaking, pulling, throwing in all ways.