Discover all kinds of vehicles in the city, on water, and in the air with this Electro Wonder Pen. Find the correct answer to the question and touch the answer with the pen tip. If you answer correctly, you will hear music and the light will turn on. The set includes 18 cards with over 40 tasks, bundled in a handy ring-bound booklet. Playing with the shapes and colors of the Electro Wonder Pen stimulates development and curiosity.