Educational Insights Geosafari Adventure Pens (Set of 3) Set of 3 pocket-sized pen tools: Land, Light, and Water These 3 pens allow kids to collect and capture, examine and investigate, study and learn about anything and everything they find! Pens can be unscrewed and removed for field work and have textured grip for writing on-the-go Land Adventure Pen includes collection vial, 4x magnifying glass, and more! Water Adventure Pen includes water dropper, test tube, and more! Light pen includes built-in ruler, LED light, and more! Requires 2 LR44/AG13 batteries, not included