This new high tech version of the Marble Mania Extreme has over 400 pieces to build a bigger and better marble run. New dual marble tracks, electronic sound chamber and a spiral track channel are just a few of the new features of the Mega set. Techno Gears Mega Marble Mania Extreme will keep your "little architect" busy creating new working and moving creations. Requires one "AA" battery. Ages 8+ years.  WARNING: CHOKING HAZARD - Small parts. Not for children under 3 yrs. WARNING: CHOKING HAZARD - Toy contains a marble. Not for children under 3 yrs.