The expected bs for a child falls into a range( rather than a single number) that varies some with the situation.
Within the first few hours of birth 40-60 would be expected, while 30-60 might be seen with a premi. After the 1st day 50-80 mg/dl, & by 1yr 60-100, teens 75-110. Those numbers apply to blood glucose
on a venous sample. Test strips are less reliable.