12 months & up. Take a mindfulness moment with these engaging Toddler Yoga Warm Up and Mindfulness Board Book Set for Young Readers. Children will enjoy stretching, warming up, or calming down. Use this set of books to lead children in safe, fun, and healthy exercises. These activities promote gross motor skills, flexibility, and balance. The books include Yoga Bear, Yoga Bug, Yoga Bunny, and Yoga Whale.