Using these flash cards is easy. You can sit with your child and go through the cards one by one, teaching them to recognize numbers and count. Parents can also use real - world objects around the house and ask the child to count them using the cards as a guide. When it comes to storage, just put the cards back into the slide - in box after use. This will keep them organized and easy to find later. As for maintenance, since the cards are printed with vegetable inks and laminated, they are relatively durable. But try to keep them away from water and sharp objects. Also, always check the cards for any signs of wear and tear, especially if your child is very active. These cards are made to high safety standards, but always supervise your child when they are using the cards to ensure they don't put small parts in their mouth.