Using this product is super easy. First, fill the chunky pen with water. Then, use it to complete the connect - the - dots activities or color on the farm - themed pages. After you finish, just wait for the page to dry and the pictures will disappear, so you can start over again. When you're done playing, store the pen in the cover to keep things tidy. As for maintenance, make sure to keep the pen and the set dry when not in use. Also, don't let kids play with it near water sources to avoid accidental spills. This product is great for kids 3 years and older, so have a blast with it!