This year, Cadence was Felicity, the discontinued American girl doll. (Basically, a colonial girl). I made her whole costume, which I came to regret a little bit, because while it turned out great - it took a lot of my precious free time this month.
Piper was a unicorn. This was a super easy costume. I made a felt horn and attached it to a headband, then made a mane and tail with ribbon and yarn attached to felt.