Safe&Non-toxic: Use water as pigmentit is very safe even baby bite the pen! Perfect Tracing Practice: With lettersnumber and time patterncan help kids learn to write well! Manufacturered by Per. Reusable:The color will disappear automaticallyand baby can paint on it again! Durable: Made of high-quality oxford cloth much more durable not easy to be torn. Magic Coloring Book:The color will change soon and become plump when finds water!