My 12 year old brother is really into Spongebob (still, thankfully since I bought this fabric to make a xmas gift for him 2 years ago and I just now got around to it).
What the heck is a snuggle bag?...
It's like a sleeping bag, w/o a zipper on the side. You just snuggle down into it. I was originally making a normal 2 sided blanket and then decided not to sew up the last seam so that it would be a snuggle bag instead.
Cotton spongebob fabric on one side, soft and toasty fleece on the other.
What the opening at the top looks like:
Of course I had to try it out to make sure it worked...