4M Kidzlabs Tornado Maker Science Kit Diy $19.99 Default Title Out of stock Please fill in the form below if you'd like to be notified when it becomes available. Your Email Send This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply. Form your own tornado twister using a recycled bottle filled with water and attached to a battery operated base. Requires two AA batteries (not included).8yr+