Q2: Do I come up those hats idea?

Yes, the director of the children threater told me that she was going to have Alice in wonderland and I need to make some costumes to make the girls like those flowers. So, flower hats will be the perfect choice.
Q3: How to make the flower petals stand up?
I used stiff interfacing and plastic wire on the edge.
Q4: Do I have anymore photos?
No, because the play is patterned or licensed, so no camera was allowed in the threater.