Makeshift "barrier" help? Cosleeping with baby and 5-year-old

[smeep]

Okay, so I will be cosleeping with my 5-year-old DS and the new baby who will be here in about a month and a half. I have a queen size bed that's up against the wall in the corner. I've been told to have DS sleep on the inside... but I worry about baby falling off if s/he is on the outside. Plus, as terrible as this sounds, I would rather DS be on the outside. He sleeps in the craziest positions and if he's on the inside, he'll just push me until I'm squished in the middle trying not to knock baby off.... at least if he's on the outside he'll fall off which, yes that sounds terrible, but he does that regularly right now as it is. He just grumbles and climbs back on the bed...or just falls asleep on the floor. 

So.... I've been told that baby should sleep on the outside and I should make some kind of barrier on the edge of the bed (strip of foam thing made for that) so baby can't roll off. But, if I could do that, couldn't I do it on the inside? That way there's no risk of baby falling between any space between bed and the wall? 

On that note, wherever I put the barrier... what on earth do I USE? I have NO money to buy anything special. But I don't know what to do. And I think I've heard to use rolled up towels or something before but, uh, wouldn't that just be recipe for suffocation?

[Artichokie]

what is your budget?  we have this: http://www.humanityorganics.com/humanity-family-sleeper.html

[smeep]

My budget is like... maybe making something myself or getting it from a thrift store (if I find it which I doubt I will, haven't yet at least)... but, yeah, that's about it. I don't have a job, baby's "father" hasn't given me a dime in several months and I'm living with my parents (hence the three of us in one room, heh). 

That actually looks like a really good idea if I could just figure out how to make it. Getting a sheet to use is no problem, we have tons and I can just make my sister sew it so it leaves room for the insert.  The question is... what could I use as an insert like that? Do you think a craft store might have something? I suppose I could probably just use any kind of foam if I could find something big enough... but would there be any hazaard with it, even if it's totally covered?

[emeraldhips]

Yeah, that definitely looks like something you could make. I used a Snuggle Nest, and removed the sleep positioner. Basically looks like this:

http://www.amazon.com/First-Years-Close-Secure-Sleeper-Creme/dp/B0010P0J9G/ref=sr_1_1?ie=UTF8&qid=1294883601&sr=8-1

They might have recalled the Snuggle Nest because of the sleep positioner, but it was removable.

But definitely not budget friendly. Maybe you could find one used? It worked great until she was big enough to sleep in the bed with us. She was so small, I worried about DH rolling over, or flipping the covers over her.