Fun with Vortex Rings in the Pool Create half-ring vortices in a pool by sliding a plate through water and adding food coloring to the ends. Facebook Prev Article Next Article Experiments Checkout these cool gadgets... Related Posts Reaction between aluminum and gallium Gallium Induced Structural Failure of a Coke Can Fidget spinner spinning in space! Footage Of Russian Experiment Shows Dog ‘Breathing’ Underwater Man vs high powered fan Compilation of Amazing Science Experiments