Highlights 345-Piece Mega Set: Build a giant city with a crane and 4 vehicles. Flexible Track Snap: Easy-to-build layouts for infinite creative roads. Hours of Focus: Keeps kids engaged while you enjoy a quiet break. CPC Gold Safety: 100% non-toxic, certified, and reliable materials. Skill-Building: Boosts hand-eye coordination and STEM thinking. This City Construction Track Set turns any room into an industrial world of adventure. Its a smart solution for modern parenting that replaces screens with active building. Your child masters focus and dexterity, giving you quality relaxation while they create their own bustling city. Educational Value: This set is designed based on core developmental milestones. To see the research behind our toy selection and how they benefit independent play, visit our Research Blog.