Magic Water Reveal Cards Reusable non-toxic Cards for Kids Early Childhood Education | 24cards | Kids Learning with Fun. Pack of premium quality, both side printed cards for Early Childhood Education. Helps in Rapid Learning & Quick Memorization. Attractive & sturdy packaging; Best item for gift. Colorful image magically appears using the unique refillable magic water pen. Let them dry and watch colors fade away and use your water pen to reveal again. Kids can have hours of fun with this. 100% Safe and Non-Toxic Mess Free Color With Water, Let Dry And Color Again With Free Refillable Water Pen Inside.