Simply scrape away the black layer to reveal a stunning rainbow picture below! Our Engraving Art Rainbow Sets come with everything needed to complete the project. These sets are a great way to create beautiful engraving art- even if you’re a beginner. Experiment with different techniques using the included practice board. Package Contents 1 8″ x 10″ Preprinted Board, 1 Practice Piece and 1 Scrapecutter.