2 years & up. With a limited vocabulary, toddlers may have a difficult time expressing their emotions. Emotion stones offer a tactile and visual way of introducing young children to emotions. Children can strengthen their expressive and receptive language as they learn to talk about feelings and emotions with these easy-to-hold mirror. By using the learning materials included in the Open to Emotion Backpack Kit it will help young children develop the skills they need to increase their emotional intelligence.