Using these flash cards is simple. Parents can sit with their kids, pick up a card, and read out the name of the fruit on it. You can also play games like asking kids to find a specific fruit in the real world according to the card. As for storage, just slide the cards back into the box after use. When it comes to maintenance, since they're printed with vegetable inks and laminated, a gentle wipe with a damp cloth should be enough to keep them clean. Please note that these cards are for kids aged 3 and above, so make sure to supervise younger children to prevent choking hazards.