【Educational Value】 This wooden Montessori number card is designed to deepen children's understanding of numbers. The color-coded cards help children learn numbers visually. 【High-Quality Materials】 Made of durable wooden materials, ensuring long-term use. Safety is also taken into consideration. 【Convenient Storage】 The included wooden storage case helps to organize the cards and makes them easy to carry. Thank you for viewing. I incorporated a bit of Montessori, and my child used this during their early childhood. They were able to see and say numbers from 1 to 9999 after using this when they were interested in numbers. There are no noticeable stains. Also, this was purchased through personal import. Please understand that this is a used item before purchasing.