Break out the test tubes and learn science! Kids love experimenting. These over-sized test tubes are each stuffed with materials for 3 to 6 exciting, educational, and safe experiments. Science tubes also include a guide with easy-to-follow instructions and diagrams plus kid-friendly scientific explanations. Build a circuit and light a bulb, run electricity through a pencil, split water into hydrogen and oxygen, and more! Requires one 9-volt battery.  WARNING: CHOKING HAZARD - Small parts. Not for children under 3 yrs.