Tummy time is essential for your baby’s development. But why, and what exactly is it? Our 0-2 Years Programme Coordinator Marion Byrne, from NCI’s Early Learning Initiative, has some tips for parents for getting your little one comfy on his or her tum! What is tummy time? Quite simply, this is when you place your baby on their stomach on a firm flat surface, such as a blanket or mat on the floor.