This is a math arithmetic toy, perfect for children to play. Made of premium and wear-resistant paper material, and these Math Flash Cards are safe to use. It is lightweight and so portable, safe and practical. These funny Math Flash Cards are perfect for kids to develop problem-solving skills and creative thinking. Features -Color:Assorted Color -Material:Paper - Size: 8.70X7.50X0.10cm/3.42X2.95X0.04in -The product technology is better, and the pattern color is not easy to fade off. -The product design is simple and generous, and the color is bright, easy to arouse the interest of children's eyes. -The learning Math Flash Cards comes with the different arithmetic contents for a solid early learning start. -With these educational and interesting Math Flash Cards, you can teach your kids some arithmetic problems. -Suitable for any mom, or teacher to put up in their children's room or classrooms. Package list: 54 x Math Flash Cards 2 x Pens