Water Wow books make ideal travel activity books for kids!This exciting activity book includes four reusable pages and a refillable water pen. Use the pen to fill in each activity, from coloring in boxes to tracing letters, and see hidden colors and pictures appear with every stroke! Then simply let the page dry to erase the pictures and fill it in again and again. This number-themed book includes numbers (1-20) to trace, alongside pictures of familiar objects to count. There are empty lines to practice writing the numerals, too!Pen stores on cover for on-the-go fun and no-mess cleanup.Chunky-sized water pen is easy for kids to hold.Pen is easy to fill.Promotes fine motor skills, number-recognition, and counting skills.-Includes: 4 reusable boards, and a refillable water pen.