This will teach you how to make a good and effective airsoft grenade
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Step 1: The Materials
You need an empty bottle, a paper towel, baking soda, any kind of vinegar, and BB's
Step 2: The Grenade
First you fill a quarter of the bottle up with vinegar. Then you put 3 spoonfuls of baking soda on the paper towel, and wrap it up so that it will fit through the bottle cap and put it in. Finally you add as many BBs as you want and shake it 10-15 times and then chuck it. It should explode!!!!!
Josh JuliaN made it!