4M Kidzlabs Science tornado maker With this fun set you learn how to emerge a tornado water. See what happens in the bottles with water. Put the bottles together and connect with the tape. Then shake the bottle and see the effect. specifications: Gender: junior Material: Plastic Packing dimensions: 17 x 22 x 6 cm Suitable for ages 8 years. 2 AA batteries (1.5V) Content: 1 Battery Pack 1 Bottle Holder 1 Engine with waterproof ring 1 Propeller 1 Terminalcap 1 foam ball instructions