Supersize your marble run with the GraviTrax Starter-Set XXL!Go bigger and build mega-sized marble runs with the GraviTrax Starter-Set XXL! Easy to connect and build, our construction set includes 242 diverse pieces to create a ton of custom runs with curves, levels, freefalls and 3 action accessories; Magnetic Cannon, Hammer and Loop. Designed with open play in mind, its a snap to build a different track every time. Expand your tracks stunt action with extra accessories and experience the power of gravity and educational fun again and again!What makes a great toy? GraviTrax checks all the boxes! Its a creative, open-ended, expandable track system that challenges children to use their imagination to design and build their own marble runs! Electronic-free, GraviTrax sets use STEM-friendly concepts while building critical thinking and problem-solving skills.Comes complete with instructions, 9 track designs, 24 fun challenges and 242 pieces: 9 metal marbles, 6 rugged 12 x 12 card bases, 4 transparent levels, 80 large/24 small height tiles, 36 tracks (6 long, 12 medium, 18 short), 42 curves, 1 Magnetic Cannon, 2 3-in-1 tiles, 6 X-intersection tiles, 2 vortex, 4 switches, 2 launchers, 8 basic tiles & inserts (4 catchers, 2 freefall, 2 Y-intersections, 2 landings) 1 Loop, 1 Hammer, 2 finish lines.Lasting durability for girls and boys ages 8 and up, its the learning toy children (and savvy adults) return to over and over again!