This corresponds with "D is for Daily Exercise."
BMI (Body Mass Index) is calculated much the same way for adults and children - under age 20. However, once the BMI is calculated for a child, their age then needs to be compared with their sex to find their actual BMI percentage. This allows you to tell if one has too much, just enough, or not enough body fat for their development. Click the links below for the forms for boys or girls, to determine the BMI for anyone under age 20.
Forms are from cdc.gov