Flower letters is a very simple and beautiful DIY project for a baby girl nursery. Buy fake flowers from the dollar store, letters from a crafts store (or just cut them out yourself) and glue the flowers onto the letter.
Love the idea of creating a super hero inspired room. Here's a tutorial and printables for recreate these super hero bins via Sugar Tot Designs sugartotdesigns. You could also put monster pics on the totes for a monster room