The Learning Journey Techno Gears Marble Mania Voyager (300+ pcs) Travel to a distant land with Techno Gears Marble Mania Voyager This marble set features dual hand cranks that turn two bucket and chain pulley systems on either side of the build, lifting the marbles to the top of the build where they set off on a new adventure! More than 300 pieces will provide children hours of fun construction building This product aligns with the Science, Technology, Engineering and Math standards For ages 8 and up More than 300 colorful construction pieces Interlocking plates, gears, 3-D connectors, tracks, and fun obstacle Dual marble chain lifters and hand cranks Builds confidence as children design structures that move and work Compatible with all Techno Gears sets