The size of the button is moderate, which is convenient for the baby's grasp, and not worry about eating. Bright color, high quality odorless plastic, each button is smooth and does not hurt baby's hand, help improve the child's recognize ability. In the game, help the child to know the shape, exercise the small hand fine motor accuracy development, improve hand-eye coordination. Your little children can learn to recognize and classify shapes and colors through matching the different buttons and unique pictures. Disguise the learning session as a super fun game easy to store all the buttons and cards when you're done playing. This kit is made of high quality and safe material. Do not worry about your child when they play. Recommended for a toddler of 3 years