My 3 1/2 year old wore this Bo Peep costume for Halloween, and her baby sis was a lamb.  Super cute!  I liked everything about the dress and pantaloons, they are soft and like normal clothes and don't have that cheap uncomfortable feel of many costumes.  The only negative was the hat didn't stay on well so she ended up not wearing it most of the night.  Practice getting it to stay on, maybe with pins, before the big night.