Water Wow! 水で浮き出るアクティビティパッド - すうじ

I grabbed this for a road trip and it kept my 4-year-old busy for almost an hour, which never happens. The pages dry clean so she just traces the numbers again and again, and the pen refills with plain tap water.

My three-year-old loves tracing the numbers over and over, and the fact that the pages dry white again means I never have to buy refills. The water pen is just the right size for her grip, and the hidden colors appearing feels like magic every single time.

My toddler is obsessed with the water pen and how the numbers appear in color as she traces them. I love that the four pages are reusable, so we can practice counting over and over without wasting paper. Just wish the pen were a bit sturdier, but it refills easily.