Hi
Thank you so much for your replies, they are very much appreciated. I realised though that I had not explained my design very well, as I meant for the wings just to be able to fold on top of each other rather than being able to flap up and down like a realistic butterfly. I have enclosed some photos of the design, quickly cut out in paper, (the real piece will be made in metal) just to be able to illustrate what I am trying to achieve.
As you hopefully can see from the images I would like the 4 wings to fold on top of each other so when the pedant is closed you can not tell what it is.

When the wings unfold it becomes a butterfly
I have tried to rivet the wings together but the wings tend to fall down when in the open position.
The “butterfly” can either have a body behind it or not depending on what is needed for the mechanics of being able to fold and unfold the wings, as well as to keep them in the open position.
As mentioned, if anyone would like to have a go at making a prototype I am quite happy to pay for the service.
Thanks
Mariann
Please excuse grammar & typos; delightfully dyslexic 