Towards the end of last term before the summer holiday, my 4-year old came back home with a big sticker being stuck to her uniform on the front of her chest. The teaching assistant wrote a note on it saying 'please bring a RED PE shirt for Thursdays'. As she went to an after-school club, she had been wearing it from 15:30 till 18:00 showing around to children and parents from other schools. I felt very sorry for her, it was my fault that I prepared her a pinkish red PE shirt. Am I being unreasonable to complain to the school in attempt to prevent from this happening to other children in the future?