I wish I had the secret behind mess-free cookies. Then again, making a mess is half the fun for kids. One option to minimize the mess is to set up a cookie decorating station for each kiddo. Place the cookies on a paper plate or parchment-lined baking sheet or cutting board. This will help minimize the amount of sprinkles that end up on your floor. After the cookies are decorated, toss the paper plate or parchment paper.