In my child's school, they allow children to play cards during recess time, such as the topps Match attax. My child has collected a lot of cards and put all of them in one big binder, but one day he lost the binder at school.The next day, he found it in the lost property but about 90 cards were taken away, among them were his favorites and some of the rare cards he borrowed from his friends. What shall we do now? Maybe they shouldn't play cards at school? Or write name on every card?