Power Pen® Learning Cards: Reading ReadinessProvide students with activities that help build foundational reading skills. The full color cards provide picture clues to boost understanding. Use the power pen (sold separately) to receive immediate audio and visual feedback. Each set includes 53 double sided practice cards as well as instructions and answer key cards. All grades k+. Product dimensions: 5 1 2" x 3 1 2" cards. UPC: 88231961000