From what moment to worry?
Your Aurélie, usually spinning, is wise as an image, Felix starts to clown in class ... The signs of discomfort take multiple forms, but always mark a break with the usual behavior of the child. No panic. The learning is not linear, it is done in stages. To be confronted at times with the difficulty is normal, because it is at the cost of the effort that new skills are born. Be alarmed if the symptoms of the change of attitude are repeated and settle down in time.
