Forerunner 55 for Kids (10)

My son (10) will get a forerunner55 for christmas. we dont want a watch which has games on it. so we just want activity tracking during running / soccer and a long battery life. the forerunner 55 cant be integrated into "garmin connect jr. app". is there a way to integrate it into the garmin connect without cheating about his real age

(garmin connect doesnt accept his real birthday).

many thanks

regards