Step 1: Materials
Was it worth it? Lets find out.
Things you will need: (and what I paid for them)
Sewing Machine (I didn't own one, so 90 bucks)
Fabric (on sale for 2.97 a yard so I spent like 20 bucks)
Thread (5 bucks for two big spools)
(edit: I added a new step for the new stuffing)
Stuffing (I used bed mattress and cut them up, around 120 on 7 of them, hopefully you are smarter and can find something cheaper, they sell the stuff preshredded but much less economic)
Velcro (6 buck for 5 yards or something, industrial strength, a zipper would work too)
Measuring tape (mine was lost in my house, so 3 bucks)
Razor blade (also lost in the house, 1 dollar)
Scissors (something i actually owned, maybe 2-6 bucks?)
Helpers, well, help (any where from free to a dinner each, depends on where you go)
I saw the link before but also gregsabo pointed out inexpensive pre-shredded foam!, looks like a good deal to me, for my project I'd want at least 4. Depending on what you want to use the foamsac for you might not need to fully fill it, if it's meant to lie in, loose is ok, if you want it for more of a lounger a bit more firm would be better, however for a sofa style you will need it just about full so that there is enough for everyone.
Step 2: Stuffing!
This foam is good, not great... well maybe. There are different kinds of foam of different texture and consistency, but all around find as they are in tiny pieces. However one type of white foam fell out in a few large pieces, no big deal just a little bit of ripping later and problem solved. And for the price, wow, I am glad that foam was pointed out to me. I wouldn't call my bag full yet, but the bags are definitely well packed, even after letting air in they were still pretty dense, so I would say you can do the math to figure out how much you need (in volume, so in my case I need 2.5'x2.5'x7' worth of foam) and then maybe add another small bag or two more then what you think, because you need to remember that the foam will squish (obviously) and the fabric you used will maybe stretch or at least reform.
Filling it is a whole different barrel of fun.
Step 3: Cutting
So any way, personally I bought a 5 yard by 60" panel of cloth, plus another 2 1/3 yards for the ends, this was way more then enough to make my 7 foot bag.
I cut the pieces into 7 foot by 30 inch sections, then (actually I sewed that together first but whatever) cut a few 30 inch by 30 inch squares, and then I cut 2 30" x 20" sections for a secondary mouth for the velcro side (I'll explain later, but I messed it up any way)
Also you are going to need 2 strips (or in my case 1 because I was thinking backwards, it was late give me a break) of velcro however its smartest to cut this near the end because the measuring depends on your seam size.
Step 4: Sewing!
Simply sew the 4 panels together length wise (and inside out for those of you non-previous-sewers)
No big deal.
Then on one end sew a 30" x 30" square to cover the end (yet again you should see all 4 seams when you are done, you are going to flip it inside out duh)
Then the trickier part...
Step 5: The Open End
But first what I did.
Thinking backwards i sewed a 30" x 20" panel down to 3 panels. (then I realized I should have sewn the larger piece first, oh well). Then i sewed the 30" side of the second piece to the opposite side of the bag I now have, cut this new piece so it overlaps the first by about 2 inches, then i sewed the other 2 sides down.
Finally I put the sticky velcro on both pieces so I have a straight mouth that velcros shut.
I hope that made sense.
What I meant to do was first sew 3 sides of the 30" x 30" square down and make a velcro opening, then after that do what I actually did first so that you would have 2 layers and 2 openings.
That probably made no sense but maybe pictures will help. And some thought / corrections.
Step 6: Now the Last Real Step: Stuffing!
I tried many things here like; using a piece of wood and razor blade to cut pieces, using a scissors to cut up chunks, folding the foam and cutting the fold into long strips and cutting that into chunks, etc etc etc...
In the end, we just started ripping the foam by hand into tiny bits.
Thats another good point. At first we started pieces about 2" x 2". Then we got lazy and just ripped out large pieces, maybe up to 6" x 6". After a while and many tests I realized that the larger parts makes the chair look lumpy and you can feel the lumps, they aren't a big deal but if you have the patience stay small.
Moral of the story, find your own way but smaller is better.
So hours and hours of tearing bed pads into small bits of foam made us realize my bag was way too big, I bought 5 full size mattress pads and 2 queen sizes. As I write this I'm 1 queen size and probably about 3 1/2 full mattresses done and it is MAYBE half way full. However even only at half way full I slept on it last night and it was super comfortable, it just doesn't work as a sofa yet.
Just keep going until its full enough for you.
For the old foam we found the best method was to fill a box (the sewing machine box in our case) until it was packed in, then one person holds the bag open the other dumps the foam in.
The pre-shredded foam was easy but a bit messy. My helper was states away so what I did was put as much of the foam tube bag thing into my non-bean bag chair and then use my knife to make a cut length wise and just keep going until it was empty. Their foam is really fine so expect to make a mess on something, whether yourself or your surroundings.
In dan's bean bag instructable he had a good idea for those of you with a stair case, just put the bag down some stairs any way possible and dump away, I didn't have that leisure so it was a bit tough but I did it so I bet you can too. It's not a hard to grasp concept, just fill the darn thing!
Step 7: Enjoying!
This chair won't burst open and shoot Styrofoam every where. it doesn't make that crinkly noise. It bounces back to whatever shape it started at kind of. It is way super soft! And it didn't cost you as much as a commercial version would, it's just not as good sadly, well mine wasn't.
It works great for sleeping on, just a warning though it actually gets warm sleeping on it. It is a super comfy chair that you can toss around and mush up like a pillow into a preferred position. Also its easy to move because it squishes down to almost nothing.
So was it worth it? For me, who used to sleep on an air mattress that his cats deflated and moves a lot and lives in tiny appartments, definitely. For you who is a bit smarter, maybe has more time and/or money, you might have better ideas.
I just wanted this to be more of an idea to get those big brains out there inventing better/cheaper functional/fun furniture so I can copy you.
So please please please tell me everything I did wrong, and try to ignore my instructable awkward virginity loss.
Thanks again. Enjoy!