Step into a prehistoric adventure with GraviTrax Junior Dinosaur Starter Set XXL! Designed for little builders aged 3 and up, this roaring marble run system combines dino-themed fun with hands-on learning. Build your own dinosaur world complete with a mighty T-Rex, towering Longneck, and fantastic track pieces—all crafted from eco-friendly wooden bioplastic. The innovative lift element adds extra excitement to your marble runs while you develop motor skills and spatial thinking through creative play. Decorate, design, and watch marbles roll through your custom dino landscape as you explore cause and effect. With endless expansion possibilities, your prehistoric marble worlds can be rebuilt again and again for hours of imaginative, screen-free entertainment.