If youre not very artistic, I found some templates online for crown designs: This DIY craft would be perfect for topping off a hime kei.
felt princess crowns by cutesy crafts This would definitely take more time than the cut-out printables, but might make a good project for older teens to do for/with the younger kids. These could also be awesome soft-circuit projects.
A crown for Marianne's new curly hair. You deserve it, it's pink, wear with pride! crochet crown - free crochet princess crown pattern - from Stitch A Yarntastic Life =