1. Baby\’s physical development At one year old, the baby\’s height and weight usually increase by about twice what they were at birth. In addition, the baby\’s head circumference will also increase. During this stage, babies begin to learn to walk and stand, and their hand-eye coordination improves. In order to help babies develop better, parents can provide them with appropriate toys and activity space. 2. Diet recommendations for one-year-old babies At one year old, babies can already start eating solid food. Parents should provide them with a varied and balanced diet, including protein,