Color a magnificent masterpiece and then switch it up with totally unexpected changes in color with the Switch-Eroo Color Changing Markers. Each marker has two sides, one for regular color and the other for a mystery color change. After you draw with the regular marker just apply the switcheroo side and see what crazy colors come up for totally unexpected color changes. The Switch-Eroo marker set comes with 12 colored markers with chiseled tips for thick and thin colored strokes. Color Changing Markers 12 Colors in the Set Chiseled Tips Suitable for Ages 3 and Up