Ravensburger GraviTrax: FlexTube Accessory| STEM Toy for Kids Ages 8 and Up | Compatible with All GraviTrax Systems | Ranked No.1 Marble Run System in The U.S

Connect different levels of your tracks with the “GraviTrax FlexTube” and keep the fun racing along!What comes up, must come down, and with the “GraviTrax FlexTube” you’ll easily change your marble’s direction and track level in a race to the finish! Four FlexTubes are included, and each may be configured in a 60-degree angle, u-shaped or s-shaped tubes to add extra stunts to your amazing marble run. The set also includes 4 height tiles to raise your run even higher! It’s a snap to combine “FlexTube” with any “GraviTrax Starter-Set” to 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 4 FlexTubes, 4 height tiles 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!

• [GraviTrax: FlexTube] Connect different levels of your tracks with the “GraviTrax FlexTube” and keep the fun racing along!
• [INNOVATIVE] The GraviTrax interactive track system allows you to design and build your own race tracks and experiment with gravity, magnetism, kinetics
• [STEM TOY] Boys and girls ages 8 and up can experience educational and science play. 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.
• [COMPATIBLE] Easily extend play time - All sets are compatible and functional with all GraviTrax systems
• [GREAT GIFT] GraviTrax is an a ideal holiday and birthday gift for creative, curious kids and adults who love to build.