GraviTrax Junior My Planet Starter Set invites children aged 3 and up to build their own interactive ball track worlds. This engaging system combines construction play with imaginative storytelling—kids design custom tracks, decorate themed environments with charming elements, and watch balls roll through their creations. As children build and play, they naturally develop motor skills and spatial reasoning while discovering cause and effect through hands-on exploration. The included animal figures and decorative pieces spark creative role play and imaginative world-building. The modular design means the fun never ends. Additional GraviTrax Junior components and themed sets let children expand, redesign, and reimagine their worlds again and again. Perfect for solo play or shared adventures with friends and family.