The new Genius edition of Marble Mania is truly a work of art! This high tech set includes over 500 pieces of Marble Mania gear to keep your young architect busy for hours on end. Once built, watch the Genius come to life with exciting twists and turns, electronic sounds, loops and rotating gears. The Genius edition features 4 independent tracks for marbles to run, and all lead back to one of the dual power lifters on the system. This is a must have product for all those little Genius' in your home! Requires four "AA" batteries.