Using this product is super easy! First, grab the 'magic' invisible ink marker that comes with the activity book. Open the 24 - page book to any page you like, and start coloring the vehicle - themed pictures. As you color, vibrant colors and patterns will start to show up. There are also seek - and - find activities on each page to keep you entertained. When you're done, store the marker in the cover to keep it safe. Remember, the marker only works on the pages of the book, so don't try to use it on your clothes or furniture. To maintain the product, keep it in a dry place and avoid bending the pages too much. This way, you can enjoy many coloring sessions with your Melissa & Doug Colorblast Vehicles activity book.