Environmentally friendly and safe for children: PLA is a biological material refined from corn and grains. no smell, non-toxic, premium material allows smooth printing, almost no jamming with evenly flowing filaments. No unpleasant smell and safe for children. Enjoy 20 different colors: 20 colors of PLA filament to doodle your idea of 3D artistic masterpiece. A great gift set for your kids and art lovers to have fun with crafts and drawing. Give yourself more options for your creative adventure. A perfect gift for you to have fun creating 3D art. [Strong compatibility, wide range of applications]: Strong compatibility, wide range of uses: The wired refill is universal design, compatible with filament 3D printers with a diameter of 1.75mm, and the size accuracy is +/- 0.05mm, suitable for large most printing pens 3D require excellent detail and application requirements. Easy to use by children and adults. [High quality material]: Achieve the highest standard, circle diameter consistency makes the nozzle flow the best. The applicable temperature is 160-210, it can be formed quickly without cracking or foaming, and the pla material will not block the discharge port, which will bring you a better experience. [Great Gift]: Whether it's for a birthday, Christmas, any DIY, crafts, school and interesting creative projects, you can use the printing filament. It is the perfect gift for your children and friends.