What are you waiting for? This kit is for your future little scientists. If they love to experiment, they'll love this glow in the dark kit. The kit allows children to add their individual insights, problem-solving skills, divergent thinking, and perseverance to their play as they learn and practice real-world skills and concepts. Great sleepover or birthday party activity. Experiments smell, ooze, glow, and bubble over for hours of fun. Requires three 1.5 V LR1130 batteries (not included).