These glasses are by no means suitable for 3-6 year olds. They are at most suitable for 3 or very small 4-year-old children. The specifications here state that they have a mirror which they do not have, it says they are not for babies while the receipt says they are for babies. And in other glasses that I bought, the "characteristics" are still irrelevant to the glasses I finally received. It would be good for these to be corrected because when it comes to gifts on specific days, the exchange is almost impossible either time-wise or practically since it is not often for Athens. Another disappointment once again here.