Most babies are already ready to start eating solid foods as early as 4 months. There are some who feed their babies with cereal at age of 3 months. It is also important to start giving the baby a single cereal as an introduction to solid foods before giving fruits and vegetables. While giving solid food is good, it is still better to give them breast milk as it provides all the nutrition a baby needs. Here is a feeding guide that will help you a lot in caring for your babies, http://www.lpch.org/DiseaseHealthInfo/HealthLibrary/growth/fdgd.html.