EDI1137 Features: * Hot Dots pen gives immediate feedback for correct answer choices * With flashing lights and one of seven positive sounds or one of two gentle incorrect answer sounds for wrong choices * All cards can also be used without the Power Pen as traditional flash cards * Grade: K and up * Age: 5 years and up Dimensions: * Dimensions: 3.9"" H x 2.7"" W x 5.7"" D