About This

• MARBLE ORGANIZATION: Keep your GraviTrax marbles neatly stored with this set featuring 4 snap-shut boxes and 12 new marbles
• CREATIVE STEM TOY: GraviTrax sets encourage kids 8 and up to explore science, technology, engineering, and math through interactive play
• INTERACTIVE RACE TRACKS: Design and build your own race tracks for endless fun and learning about gravity, magnetism, and kinetics
• COMPATIBLE WITH ALL GRAVITRAX SETS: Extend your play time and possibilities - this set works seamlessly with all other GraviTrax systems
• IDEAL GIFT: Perfect for holidays and birthdays, GraviTrax sets inspire creativity and curiosity in kids and adults alike