She requested a "unicorn" party so we went with "Unicorns and Rainbows". We had all kinds of "rainbow" candy and foods such as skittles, starbusts, unicorn horn lollipops, m&m's, colorful veggies and fruits, bugles (unicorn horns), etc. At the end of the party, I put all the candy on a table and the kids each could scoop what they wanted into a bag as their party favor.
Here is Cora with her new unicorn. I found it on an Etsy site.