Reportage on the daily life of Oscar, a 3 and a half-year old boy who has type 1 diabetes. Oscar has a glucose sensor and insulin pump. He started nursery school this year. His parents had to train the school personnel in how to control and regulate his blood sugar levels throughout the day. After the meal, a nurse administers the bolus of insulin. She uses the notebook filled in by the head of the cantine showing the quantity of carbohydrates eaten during the meal.