This Lakeshore Counting Mystery Box is perfect for teaching math skills to preschoolers in a hands-on way. The box contains cards that feature different math problems, making it an educational and fun tool for kids. The recommended age range for this box is 3+ and it is geared towards kids in the Department of Education. The box is made by Lakeshore and is categorized under "Toys & Hobbies" and "Educational" on eBay. It is a great addition to any preschool or homeschool classroom and is perfect for parents who want to teach their children math in a fun and engaging way. * missing 1 activity mat, box has 9 activity mats not 10. All other pieces are there.