3Doodler Start Eco-Plastic-Punk Star Purple - 2Pack - Do you want to take your creativity to new levels?3Doodler Start Eco-plastics are low-heat BPA-free and non-toxic so they completely safe for kids and are compatible with 3Doodler Start Pen only. Bring any idea to life or Personalize your existing items! Safe to Doodle on almost any material such as Lego and the plastic can be easily removed through will adhere firmly to clear plastics. 3Doodler Start Eco-plastics extrudes to 6 times the original length so one 6 inch Strand gives over 35 inches of doodling. Now with a wider range of 19 vibrant colors.