Lunchbox Challenge Step by Step instructions on how to play the Lunchbox Challenge Challenge Leader Instructions Lunchbox Challenge Promotion Assets Enter your results The Great Protein Lunchbox Challenge The below assets are available to you to help make your Lunchbox Challenge a success! You can download the entire Lunchbox Challenge Kit (zip) or download only the files that you need. Preview and download only the files you need from the Lunchbox Challenge Kit here