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The franchise has sold over 15.5 million units worldwide and has ranked as the No.1 marble run system in the U.S., according to the NPD Group.\u003c\/li\u003e\u003cli\u003e[COMPATIBLE] Easily extend play time - All sets are compatible and functional with all GraviTrax systems.\u003c\/li\u003e\u003cli\u003e[GREAT GIFT] GraviTrax is an a ideal holiday and birthday gift for creative, curious kids and adults who love to build.\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eImportant information\u003c\/h4\u003e\u003ch5\u003eSafety Information\u003c\/h5\u003e\u003cp\u003eSmall balls. Choking hazard.\u003c\/p\u003e\u003ch5\u003eDirections\u003c\/h5\u003e\u003cp\u003eAssembly and usage instructions are provided.\u003c\/p\u003e\u003ch4\u003eProduct Description\u003c\/h4\u003e\u003cdiv class=\\\"product-desc\\\"\u003e\u003cp\u003e Take your marble for an unexpected spin with the “GraviTrax Loop” accessory! Turn your marble upside down and add a challenging element to your interactive track with this exciting “GraviTrax Loop” accessory! Experiment to see how much momentum the marble needs to loop-the-loop and keep it going on to the next element. Problem-solve by adjusting track pitch to build speed. Comes ready to snap together along with 6 additional track pieces; this accessory makes a great addition to any “GraviTrax Starter-Set”. Experience the power of gravity and educational fun today! What makes a great toy? GraviTrax checks all the boxes! It’s a creative, modular, expandable track system that challenges children to use their imagination to design and build their own marble runs! Electronic-free, GraviTrax construction sets use STEM-friendly concepts while building critical thinking and problem-solving skills. Completely open-ended, every GraviTrax set has a boredom-busting variety of play options for hours of fascinating fun. Once the basics are mastered, simply add expansion sets and accessories to propel those metal marbles around the tricked-out track of your dreams! Comes complete with 1 Loop tile, 6 tracks (1 long, 2 medium and 3 short) and instructions. Lasting durability for girls and boys ages 8 and up, it’s the learning toy children (and savvy adults) return to over and over again! \u003c\/p\u003e\u003c\/div\u003e\",\"59414495461457\":\"\u003ch4\u003eAbout This Item\u003c\/h4\u003e\u003cul class=\\\"about-this-item\\\"\u003e\u003cli\u003eINNOVATIVE DESIGN: The GraviTrax interactive track system lets you design and build your own thrilling race tracks - Experiment with gravity, magnetism, and kinetics to propel your marble to the finish line\u003c\/li\u003e\u003cli\u003eSTEM EDUCATION: Engage kids ages 8 and up in educational play that encourages science, technology, engineering, and math skills - Boost creativity and critical thinking with each exciting race\u003c\/li\u003e\u003cli\u003eEXTENSIBLE PLAY: Enhance your GraviTrax experience - This accessory is fully compatible with all GraviTrax sets, encouraging extended play and more complex track designs\u003c\/li\u003e\u003cli\u003eACCLAIMED TOY: Ranked as the No.1 marble run system in the U.S., the GraviTrax franchise has sold over 15.5 million units worldwide - A testament to its engaging, high-quality design\u003c\/li\u003e\u003cli\u003ePERFECT GIFT: Ignite curiosity and creativity with GraviTrax - An ideal birthday or holiday gift for aspiring architects, eager engineers, and fans of innovative toys\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eImportant information\u003c\/h4\u003e\u003ch5\u003eSafety Information\u003c\/h5\u003e\u003cp\u003eSmall balls. Choking hazard.\u003c\/p\u003e\u003ch5\u003eDirections\u003c\/h5\u003e\u003cp\u003eAssembly and usage instructions are provided.\u003c\/p\u003e\u003ch4\u003eProduct Description\u003c\/h4\u003e\u003cdiv class=\\\"product-desc\\\"\u003e\u003cp\u003e Turn the world of marble runs upside down with the Ravensburger Gravitrax Loop Accessory. This innovative STEM toy allows children aged 8 and up to design and build their own gravity-powered race tracks, experimenting with magnetism, kinetics, and the power of gravity. With GraviTrax, every race is a thrilling journey to the finish line. Extend the fun by integrating the Loop Accessory with any GraviTrax set, enabling even more creative and complex track designs. With over 15.5 million units sold worldwide, GraviTrax stands as the No.1 marble run system in the U.S. As a testament to its interactive and engaging design, it's the perfect gift for curious minds and creative spirits. Discover the endless possibilities of GraviTrax and learn the laws of physics in a fun and entertaining way. 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