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 The Greatest Failed Experiment Ever Measuring People’s Reaction Time With a Ruler and High Speed Camera Splitting 10 Decks of Playing Cards with Hydraulic Press These Colorful Liquid Droplets Chase Each Other Like Living Organisms Bathing in 500 lbs of Liquid Glass Putty 20 Amazing Science Demos Using Mercury