Create your own entry - level marble and gear run with this construction set. New dual marble tracks, electronic sound chamber and a spiral track channel are just a few of the features of the Mega set. Techno Gears Mega Marble Mania will keep your young architect busy creating exciting working and moving creations. The Genius edition of Marble Mania is truly a work of art! Features: -Mega construction set. -Techno Gears Marble Mania collection. -Over 430 colorful construction pieces. -"Power Lifter" automatic ball returns. -Interlocking plates, gears, electronic sound chamber, 3-D connectors, shafts, channels, funnel and pendulum. -Expands knowledge of mechanics and engineering. -Builds confidence as children design structures that move and work. -Compatible with all Techno Gears sets.