Using this product is super easy. First, grab the paintbrush included in the set and dip it into a container of water. Then, pick a page from the art pad with perforated edges that tear out cleanly. Use the wet paintbrush to blend the patterned area on the page, and you'll see the colors in the pattern combine to form a single paint color. There are 24 pages featuring different kid - favorite vehicles, so you can have lots of fun. As for precautions, make sure not to over - wet the page as it might tear or get soggy. Also, keep the water container stable to avoid spills. To maintain this set, store it in a dry place when not in use. This will keep the pages in good condition for many more painting sessions.