Printed with environmentally friendly soybean ink, the corners are rounded to prevent scratching the skin of young children, and there is no smell. Waterproof and easy to clean, making all mothers more at ease. There are 16 pieces for a total of 32 pages, each with a different pattern on both sides. It can improve visual distance, stimulate imagination and brain-eye coordination, and let babies quickly familiarize themselves with the environment. Place the card about 11.8-15.7cm away from the baby, move slowly to attract the baby's eyes, after the baby looks at the card for 5-6 seconds, switch to the next card. Fun and engaging way for babies to explore and learn about their new world. Using them provides an opportunity for parents to spend quality time with their little ones and strengthen the parent-child bond. These flashcards make a great gift for newborns.