Pilot PILOT miffy Miffy First Time Swissui Oekaki [Age: 1 year and up] Simply fill the included pen with tap water and you're ready to go! The fabric sheet changes color when drawn on with water, and disappears when dry, so you can draw again and again without staining clothes or the surroundings. You can also play by pressing handprints and footprints. It folds up for easy cleanup. The special pen is designed to be easy for small children to hold and is safe. There were fold marks because it had been folded up. There were stains that looked like uneven drying, so I washed it with water according to the instructions, and the stains disappeared. I have also confirmed the color development. Please check the photos.