According to Mayo Clinic, typical blood sugar levels in a toddler fall between 100 and 200 mg/dL, with an average of around 70 to 90 mg/dL. A blood sugar level outside of these amounts could be an indicator of diabetes.
Blood sugar levels are affected by various factors, including the amount of activity, the content of food consumed and how long it's been since eating or being active. A lot of activity can bring glucose levels down and eating foods that contain a high number of carbohydrates can raise blood sugar levels. For most people, the pancreas will produce the insulin hormone to balance out blood sugar levels.
For a child with Type 1 diabetes, the pancreas does not produce insulin. Without insulin, blood sugar levels will continue to rise. If a person's blood sugar level is too high, he or she is at risk for ketoacidosis, which could result in coma. Glucose levels that drop below 60 mg/dL may cause fainting, disorientation and death.