An infant lies on the floor, gently rocking from side to side until she eventually succeeds in rolling over onto her tummy. Nearby, another baby is wriggling on his back, slowly making his way towards a toy until he can stretch out and reach to pick it up.
A third little one is sitting up with a straight back and perfect posture, investigating an object in her hand. A caregiver is busy nearby - she keeps an eye on the infants but does not interfere with their play to assist or correct them.