Most nerf grenedes have sucky blast radius or require non-household materials to be made. this is a simple nerf grenede that flings nerf streamlined darts up to 3 feet in each direction, requires items that can be found almost anywhere, and, also, will NOT break if accidentally droped, as the pin must be removed.
Step 1: Supplies
You will need:
19 streamlined NERF darts
1 sheet of construction paper
either a piece of cardboard (corrugation doesn't matter) or, to make things easier, a 5.8 oz edy's icecream cup
1 disposable plastic straw
1 keychain ring
1 rubber band
tape *note* - DO NOT use the regular, kind of foggy scotch tape, as it isn't sticky enough, and won't work
either scissors or an xacto knife
Step 2: The grenede
Loosely grip the darts in a fist, all pointing the same way. They should naturally form a layered hexagon, double wrap your rubber band 2-3 mm below the tips of the darts. the other end should start to fishtail. it may feel too loose, but do not put it any tighter or higher or it will be too delicate. it should be fine as it is. set this aside.
Step 3: The base of the pin
use a protractor to draw a circle about 2 1/2 in. in diameter. cut slightly outside of this circle with either the scissors or xacto. if you have the edy's container skip this step.
Step 4: Starting the pin
Poke a small hole in either your cardboard circle or your edy's container lid, and widen it just enough that the straw can slide though easily.
flip the grenede upside down and push the straw into the center dart until it collides with something. let the cardboard rest on top of the darts. *note* - if you use the edy's lid, make sure the picture is facing up. in other words, have the ridge thats supposed to make the lid stay on the cup go around the darts instead, so that it will stay on them.
Step 6: The ringless pin
cut the straw that sticks out to abbout 3/4 of an inch. tape the straw in place at this point.