Features: Introduce children into the world of painting and numbers, improving children& 39;s interests. After painting with the water pen, the whole color changes immediately. A few minutes later, the color will automatically disappear. It can be used repeatedly, very environmentally friendly. Not afraid that the kid or your house would get dirty. Fun games and pictures are printed in the back. Specifications: Material: cardboard Color: multicolor Card Size: 25.3*15cm Unfold Size: 25.3*30.2cm Package Include: 1 x water coloring book 1 x pen Notes 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Due to different personal measuring techniques, there might be 1-3mm error of the physical.Thank you