PlanToys Plancity Track Expansion Pack The Track Expansion Pack can be played as a complete set or used to expand an existing set This set contains 24 track pieces Under the Green Concept Design PlanToys selects only manufacturers utilizing a minimal waste concept PlanToys long-term commitment to social programs promotes healthy child development and environmental protection All PlanToys are made using chemical free, kiln-dried recycled rubberwood and designed with water based non-toxic colors as accent