Our NEW Altitude Wizard allows students to measure the altitude reached by their Rocket Planez by simply pointing this device at their aircraft in fight. You can even measure the height of buildings/trees with the Altitude Wizard. Students learn to interpolate between numbers along with other basic applied Math skills. Our Altitude Wizard is made of durable laser-cut plywood and is pre-assembled. Instructions needed for the successful use of the Altitude Wizard are included. Our Altitude Wizard is shown decorated with markers. Multi packs come with one set of instructions. We recommend you have 2 to 4 Altitude Wizards per classroom.