I am sure many mothers can relate--my daughter asks me almost every day if she can paint her own nails! I love her independence and her love of color, but nail polish and age five don't exactly mix so well. We decided to make her very own temporary, washable, and non-toxic polish that she can make herself and use to paint her nails all on her own. Best of all, it washed right off of her and everything else.
She mixed up the cornstarch with a little bit of water and a drop of food coloring. Paintbrushes worked great for the mixing and applying.