This neat-o little contraption from Steve Spangler science helps make those terrific Mentos and Diet Coke Geysers and retails for $4.95.
1. Load the column up
2. Stand back, pull string and watch the geyser
Why this works
Watch this video from Mythbusters
Our opinion – Well worth the 5 bucks for the excitement! We bought more diet coke when it was on sale and a multi-pack of mentos for more geyser fun.