Using these flash cards is a breeze. Parents can start by reading the cards aloud to their kids. Then, have some fun making facial expressions based on what's on the cards. This helps kids understand different feelings. When not in use, just put the cards back in the slide - in box for easy storage. Keep the cards away from water as they're printed with vegetable inks. Also, make sure little ones don't chew on the cards. To maintain them, gently wipe the cards with a dry cloth if they get dirty. These cards are for kids aged 3 and above, so always supervise children during play.