Forming healthy relationships is primary for an infant's social development. Bonding with infants is important so that they do not grow up to become "detached" from others both physically and emotionally. Infants experience three stages of growth -- as newborns, mobile infants and toddlers. Group activities and interaction help them develop their sense of self. Infants learn to imitate by observing the behaviors of others. Hands-on activities help babies develop their fine, gross motor and cognitive skills.