National Geographic 100 PC Marble run: Creative, Engineering, Physics, Activity Guide Included

Race marbles down an awesome marble maze with this marble run kit! Kids will get 66 sturdy, tight-fit construction pieces which make it possible to build an endless variety of marble runs along with 20 marbles. There is also a 14-piece 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 100-piece Marble Run!