3Doodler Start Refill Plastic Bundle, Really Rainbow (6 Pack), ONLY Compatible with Start 3D Pen for Kids (NOT for Create/+, PRO and other 3D Printing Pens) Designed safe for ages 6+ to use. Easy-to-use and Mess-free. Non-toxic, BPA-free and made from the highest quality materials. 6 filament refill packs, a total of 144 Strands of 3D Drawing and Doodling Fun! The 3Doodler Start Plastics have been subjected to the strictest standards of safety testing. Compatible with 3Doodler 3D Start 3D Printing Pen. Not for 3Doodler Create+/Create/v2/v1. Includes: BLUE, GREEN, YELLOW, RED, ORANGE and WHITE