P.s. Sorry for the fuzzy pictures. I need a new camera.
Step 1: Getting your supplies
Duck tape ( Or any tape, Duck tape just looks cool.)
A small screw ( One for each grenade. It is very important you get the right size so try a few different types)
An easter egg. ( Preferably with holes in the top, and I think yellow looks coolest)
Sand Paper. ( I find a rotary tool to be much easier, but you may not have one.)
And of course, Air soft pellets. ( I used .2 grams)
There you have it! you can start building now