Cute idea! For the stuffing, you can use a batting sold in the interfacing rack, it's more stable than quilt batting. Or you can use craft interfacing if you don't want it soft/puffy. They sell Decorbond for one brand. It should be avail in sew-in & fusible. Fusible is easier to work with to me, that way it's one less layer.

As far as order goes, I'm having trouble visualizing the project. I'd recommend you do a mock-up by folding/pinning the material (scrap if you have) and then sew a partial one of scrap. I try to make notes & will write on the material as well when I'm trying something new. That way you remember what looked right when you come back to it if you don't finish it in one sitting (likely w/a 17 mo old!) Don't forget to insert the key & string when you attach the pocket.

OK-I'm starting to see an origami-like blanket, folded up with dif. closures at each fold. Def. do a mock-up, even with paper to mark where the dif. closures need to be, cause I bet they'll end being in odd spots. It may not look right until it's done. HTH & good luck with your project!

Sounda like a big challenge for anyone and I would be tempted to make a "Book" with pages that have different closures. Zippers..buttons and button holes....snaps.... The key could hang on a chain tucked inside a pocket that is closed in any of those ways, including just tucked into a small veocro'd pociket. Over the many years of my sewing, I have seen printed fabrics that would help you out....check out ebay and esty and of course there are books that explore those ideas. Sounds very cute and good luck with your project.

Sounda like a big challenge for anyone and I would be tempted to make a "Book" with pages that have different closures. Zippers..buttons and button holes....snaps.... The key could hang on a chain tucked inside a pocket that is closed in any of those ways, including just tucked into a small veocro'd pociket. Over the many years of my sewing, I have seen printed fabrics that would help you out....check out ebay and esty and of course there are books that explore those ideas. Sounds very cute and good luck with your project.

Thanks. Yes, I did the mock/trial to see how all the closures would fit together at all stages. It will be a bit bulky - but I like the folding design. I will try to post pictures of the test version.