It's a science sleuthing activity kit! Find and observe rocks, insects, and flowers that glow under black light, make gelatin that glows, and learn counterfeit money detection, encrypting codes and ciphers, and more. Includes 22-page activity journal and black light illuminator invisible ink pen to write secret messages, too! # Pieces In Set: 3 Learning Skill: Science Power Source: Battery (not Included) Measurements: 10 Length/Inches, 9.1 Depth/Inches, 2.5 Height/Inches Base Material: 100% Paper Battery Size: Aa Care: Wipe Clean Country of Origin: Imported