I'm glad it managed to help you! Lately, I've been worried I should redo it because it was made a long time ago and I feel I could explain the process more easily now, but I'm very happy it still helps people!
I'd say to just use hot glue. I don't have a tutorial on how to make a harness, nor do I know the best way, but you can probably find a tutorial for one, or a tutorial that has one, and just glue them onto it. If you ignore that 4.5 step the wings will still be stable enough to just glue flat onto something.
What size was the original craft foam, if you'd remember? And you said you got this in-store at Michael's, right? (I'm sorry, I've been dying to try and find larger craft foam sheets, but I've never done this before D'x)
I think it was something like 12"x18" something like that. and yes, i found it at Michael's. In the isle with all the felt and most of the kid's crafts. Hobby lobby might have it too, but i haven't looked for it there so don't take my word for it
you're basically making four sets of wings. You'll glue two together to hide the wire, and where you glued the feathers on. Just make sure to layer the second half of the wing's feathers correctly so you can hide the messyness.
The wire is more to keep the foam stable because otherwise they are very flimsy and flop around a lot. You can bend the wings a bit, but they wont bend quite like actual wings. I never bent the wire in mine, so I can't tell you how exactly it makes them look, sorry.
Hey! So I'm finally getting around to using this tutorial, would you want me to note you or continue on here for questions? Does the wire allow the wing to bend into shape, like to "curl" forward to keep out of the way from bumping into people? Or will this damage and pull the glue?
you can keep asking questions this way if you want, any way is fine UvU
The wings will be able to bend with the wire, I mostly did it to make them less floppy but it does add a bit of poseability to them. The glue should hold unless you bend them too much/too far or try to bend them before the glue has dried.