Gross motor skills develop rapidly during the toddler years. Complex gross motor patterns develop, while balance and coordination improve. Most children walk without assistance by 18 months. Soon, they begin to walk faster with few falls. At approximately age 2 years, the stiff, wide-leg gait of early toddlerhood becomes a flexible, steady walking pattern, with an adult-like heel-toe progression. By 36 months, they have developed their balance and can stand on one foot briefly. Toddlers delight in their new-found skills and often can be seen experimenting with them. As any person who has cared for a toddler can attest, they climb, they jump, and they run. Supervision is key to preventing injury because toddlers sometimes test their skills beyond their abilities in an attempt to learn and do more