From sharks to fungi to the gobi desert, each card has some cool and simple facts about a particular subject in nature. My son is a little young to play this properly as he is not yet reading, but he will pick a card and ask me what each picture is. It is a great way to invite many different topics and questions. The cards are thick cardboard which is great and everything is contained in the box for easy storage and retrieval. Would it be overdoing it if I bought all of the different brainbox topics-