While it's true that babies often turn somersaults in the womb (usually during the second trimester, when there's enough room), they also move in more subtle ways. Babies stretch, flex their fingers, touch their bodies, put their feet on their umbilical cord, yawn, hiccup, turn over, curl up and, yes, kick vigorously.

Do babies do somersaults?

By 16-19 months, a few toddlers can:

Do roll-over somersaults or try to stand on their heads with arms and legs out for support (think yoga's Down Dog).

Is it safe for toddlers to do somersaults?

Do not allow somersaults, which can cause head and neck injuries. Place the trampoline away from things that can cause injury, such as trees or other structures. Forbid children under the age of six from using the trampoline. Use a trampoline net or enclosure to prevent falls.