This is what I wore to Kindergarten graduation. I knew the other moms would be dressed up so it was the perfect occasion to bring out the big earrings. I paired them with a plain shirt, distressed denim, and flats so it wouldn't be too much though.
Skirt: Forever 21
Purse: Deux Lux, thrifted (similar on eBay)
Earrings: H&M Conscious (alternative from Nordstrom)