The Best Kid-Safe 3D Printing Pen for Young Creators. With the 3Doodler Start+ creative kids can easily bring their imaginative ideas to life in 3D. The perfect introduction to the world of 3D printing, the 3Doodler Start+ 3D printing pen extrudes BPA-free plastic that cools and hardens rapidly, allowing kids to literally draw in the air! Learn about the world of 3D printing with the click of a button! The easy-to-use Start+ Essentials makes it safe and fun to design, build & problem-solve with our lightweight, wireless 3D printing pen. Includes 10 unique projects to help kids ages 6-13 begin to think in 3D. The device is chargeable with the included micro-usb cable (adapted not included). Our Start+ Ecoplastic is low-heat (approx. 60 celsius), BPA-free and non-toxic material that is biodegradable in household composts, and completely safe for kids. The box includes total 72 strands in multiple colours to start your projects!