This set of five balls offers unique sensory experiences thanks to the different natural materials from which they are made: metal, wood, wool, cork and cotton. With their different weights, sizes, perceived temperature and textures, they offer endless possibilities for free and imaginative play. Children are naturally attracted to anything that moves. Playing with balls improves their motor skills and hand-eye coordination. The balls are safe and easy to hold, even for the youngest children. Children discover concepts such as distance and speed and practice their strength and coordination. Rolling the balls also encourages crawling and social play. Playing with sensory balls allows young children to feel that they have control over something beyond their own movements. In addition, rolling a ball on the ground helps build a social bond between two people and introduces children to the principle of cause and effect.