Pretty nifty, eh? :D
Step 1: Ingredients
I probably used about 75 bags. How many you use depends on how many you have and how deep your box is. Also, make sure your bags are all approximately the same size and shape.
A Cardboard Box with a Lid
Your box should be about 12" wide, 36" long, and 5" deep, but the depth can vary. Plastic bags are remarkably squishy creatures, and they can fit into pretty much any box depth. My box was a bit wider than I wanted, so I padded the edges with crumpled-up tissue paper. My measurements are for normal sized plastic grocery bags, you can adjust for larger or smaller bags.
For cutting a hole in the box's lid through which the bags can come out.
Step 2: Bags
Step 3: Folding
Step 4: Make a Hole
Step 5: Finishing Touches
[ [Video(https://www.youtube.com/watch?v=U4A3rGuN5-o) ] ]
Yay! You're done! If you want, you can decorate the box. I didn't, because it already had a pretty pattern.
That was my first instructable, how'd I do?