I made my fuku, Moon's fuku, and used Mercury's to teach her how to sew, and Jupiter's as a training wheels project for her!
I mainly followed SparklePipsi & CupcakeCosplay's tutorials for how to make these. I used EasyCast resin for the brooches (except Moon's, which was 3D printed, but the small gems are hot glue gems instead of resin) and painted the fronts and backs with sparkly nail polish from Zoya (3 coats for the back and one for the front). For the tiaras, I used Kapalaka's tutorial/pattern and instead of using more craft foam to get the layered look, I went along the edges with puffy/3-D fabric paint, and spray painted over it when I painted the tiaras. Everything is casa satin except the bodysuits (duh) which are the 9.99/yd swimsuit liner fabric from Jo-Ann.