Techno Gears Marble Mania Extreme 4.0 is jam-packed with fun and excitement in every piece! With over 200 pieces, this set creates marble runs like never before with 3-D connectors, channels, a motorized power land much more! The possibilities are endless with so many ways to build and “power up” hundreds of marble run designs! This toy has been adapted to accept a standard 3.5mm switch, sold separately. Press and release your switch to start the marbles rolling. Press and release your switch again to stop the marbles. The button on the toy itself can also be used to operate the toy. Requires two “AA” batteries (not included). Includes 10 marbles that continuously roll through the Marble Mania Extreme. Every once in a while one might go astray and need to be put back in. Ages 6+ years. SMALL PARTS WARNING: This toy contains small parts. Not recommended for children under 6 years of age. Please allow some time to assemble this toy; as it stands over 2 feet tall and has many parts. Once together, this toy can be played with by individuals with disabilities and their non-disabled peers alike. Great for cooperative play, STEM classroom activities, and just plain fun! Video can be seen here.