Race marbles down an awesome marble maze with the National Geographic 75-Piece Motorized Marble Run Kit! Perfect for your child 8 years and up, kit includes 46 sturdy, tight-fit construction pieces which make it possible to build an endless variety of marble runs along with 15 marbles. There is also a 14-piece motorized spiral elevator that lifts marbles back to the start, over 1.5 feet from the finish line! Instructions provide tips on how to build a successful run, allowing kids to create the most exciting marble maze they can imagine. Kids will also learn about the scientific principles that make a marble run work in the fascinating learning guide. Kids will have hours of fun with the 75-piece Motorized Marble Run Kit!