PlanToys® are made from natural rubber wood trees that no longer produce latex. To strengthen the wood, PlanToys® uses a chemical-free kiln-drying process. PlanToys® are assembled using a certified E-Zero formaldehyde free glue in place of traditional wood glue. PlanToys® commits itself to find the best eco-friendly materials. The organic colors used are not only good for children but also for our environment. Quality Assurance testing is conducted with state of the art equipment at an on-site laboratory prior to sending toys out for third party international testing. All PlanToys® products exceed international safety standards including both ASTM (USA) and EN71 (Europe).