ECR4Kids GelWriter Gel Pens Set Premium Multicolor in Semi-Circle (100-Count) Great pens for mindfulness coloring books, sketching, drawing, scrapbooking, classroom projects and more; intended for use by ages 12 and up Fine tip pens with free-flowing ink; pens glide smoothly on paper without skipping 100-piece pen set includes 70 unique colors in six different ink styles -- Basic, Pastel, Neon, Neon Glitter, Metallic and Colored Glitter Acid-free, archival safe, water-based, non-toxic ink with fine 0.7 to 1.0 mm tips; soft latex-free comfort grips Convenient packaging in clear semi-circle carry case that zips open and allows for easy access by multiple users; color-coded pen cap for easy identification