It's a blue cotton velvet (the fabric photographs horribly!) with an antique lace collar (very lightly basted on, with a little pocket inside the neckline where the excess lace is tucked!) and net sleeves based on a dress of Princess Alexandra's from 1869. It has a huge train. I've only worn it twice for two rather short times, and it needs to be worn some more.
To pass out candy, of course, will be the Angry Birds dress :)