Water Doodle Pens Replacement Water Drawing Pens - A Good Educational Toy This water pen is ink-free, safe and durable in use for children. These water pens are suitable for little boys and girls to draw and write, improve their color perception and exercise hand-eye coordination. Reusable, refill the pen with water for reuse. Easy to use, just fill the magic pen with clean water and start doddle on the mat. The package includes 8 pieces water doodle pens in 2 different colors Red (4Pcs) + Blue(4Pcs). Spin the pen head to open the pen Fill the aqua pen with clear water. Spin again to close the pen Start to paint with the replacement water pen NOTES: Don't fill magic pens with ink or paints. Don't fill the water by children themselves. Please soak the pen point in water for over 10 minutes until it inflates fully to avoid water dripping and paint more fluently for the first time use.The drying speed of water print varies depending on the drying degree of the environment, 5-10 minutes in summer, uncertain in winter for large temperature differences in different places.Trace may be left on the edge where you have painted with yellowing water, which does not affect normal use and can be removed after washing. Replacement Water Pen This magic pen filled with water will create fabulous doodles and images. Don't need any removal tool, the painting will magically disappear in a few minutes. Let your child's imagination run free without dirtying anywhere or hurting your child.