Advice Needed: Snap Up Sleeping Bag

[penguin129]

I think there are some other crafters out there. I am making my cousin's daughter a snap up sleeping bag for her 2nd birthday. I found two tutorials for two different styles. One of them using batting and basting to be more like a quilt and the other one just sew up like a regular blanket. I bought everything to do the quilt like one, but am re-thinking it after seeing the second tutorial. Which one would you do? We live in FL so these really aren't for warmth in camp outs. They are more for snuggling around the house. Here are links to the tutorials I found. Any thoughts are welcomed. This will be my first project like this.
I have used snap before because I made DD cloth diapers when we started CD'ing.

Blanket Like Sleeping Bag

Quilt Like Sleeping Bag

[cmeon]

We're in FL, too. I'd do the cotton fabrics (flannel is fine) on the outside, cotton batting on the inside. It's really important to have breathable fabrics here, and poly (fleece/batting/whatever) just does not do that.