The Magic Tablet - Addition and Subtraction, from Europrice, is the edition of the collection dedicated to practicing addition and subtraction operations using a small LCD screen with a pen. The secret of this Magic Tablet collection lies in its hybrid format: on the outside it appears as a robust, illustrated book, but when the cover is opened, a small LCD screen appears. The child uses the included pen to follow the lines and, whenever they want to start over, they simply press the erase button to clear the screen in an instant. Europrice is the leading children's book publisher in Portugal, with a catalog designed to stimulate creativity and motor skills through hands-on practice, instead of a screen. It is a preferred option for practicing mental calculation repeatedly, without wasting paper or colored pencils with each attempt.