3Doodler Start 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, though will adhere firmly to clear plastics. 3Doodler Start Plastics extrude to 6 times the original length, so one 6-inch strand gives over 35 inches of doodling. Assorted Fire and Ice 24Pk colors include: (6 each) Aqua Mint, Lemon Zest, Simply White and Tangerine Tang. Assorted Primary Pow 24Pk colors include: (6 each) Cherry Red, Koala Gray, Ocean Blue and Spring Green. Assorted 75Pk Pack 1 colors include: (25 each) Cherry Red, Ocean Blue and Simply White. Assorted 75Pk Pack 2 colors include: (25 each) Lemon Zest, Spring Green and Tangerine Tang. Assorted 75Pk Pack 2 colors include: (25 each) Black, Baby Pink and Koala Gray. Assorted Fire and Ice 250Pk colors include: (50 each) Aqua Mint, Baby Pink, Lemon Zest, Simply White and Tangerine Tang. Assorted Primary Pow 250Pk colors include: (50 each) Black, Cherry Red, Koala Gray, Ocean Blue and Spring Green.