Discover the dinosaur age with GraviTrax Junior Starter Set L! Perfect for young builders aged 3 and up, this engaging marble run system brings prehistoric play to life with charming dino figures and themed track pieces. Everything you need is included to start building immediately—tunnel curves, switches, multi-directional curves, and crossings create exciting pathways for your marbles. Crafted from sustainable wooden bioplastic, each component is designed with little hands in mind. As children design their own dino-themed worlds, they naturally develop motor skills and spatial awareness while discovering how cause and effect work through marble movement. The adorable dinosaur figures spark imaginative role-play and creative storytelling. Ready to expand? Add extension sets to rebuild and reimagine your marble landscapes again and again for endless entertainment and learning.