An internet connection is required to use this product. Practice addition and subtraction within 20 in a fun and engaging way with these interactive digital mystery pictures for tablets, computers and all interactive whiteboards (SMARTBoard, Promethian, Mimio). Six winter themed mystery pictures are included: Snowman, Penguin, Polar Bear, Fox, Owl and Toboggan. FANTASTIC FEATURE #1 – Quick and Easy to DifferentiateQuickly choose the questions to be used in the mystery picture and then save your