A 3-year-old boy from rural Maharashtra is brought to the clinic by his mother. His weight is 10 kg and height is 85 cm. On plotting on the WHO growth chart, his weight-for-age is between the 3rd and 5th percentile, and height-for-age is at the 10th percentile. The child appears clinically well with no signs of acute illness. His developmental milestones are appropriate for age. What is the most appropriate next step in management?