There are not many items in our product room that get as much use as the classic Tornado Tube. Just fill a plastic soda bottle (you supply) 2/3 full with water and connect it to the tornado tube. Then connect another bottle, and you're ready to go. A quick flip of the bottle and a little swirling motion and you have created your own water vortex. Add glitter or food coloring for an more dramatic swirl. Here at ScienceBobStore, Tornado Tube races are also popular. For ages 4 and up.

TORNADO TIP: To keep bottles from bending or getting dented, use carbonated water (seltzer) when filling the bottles. The pressure from the carbonation helps the bottles keep their shape.