This year my youngest (having just turned two years old) wanted to be Foofa from Yo Gabba Gabba!
I used Simplicity Pattern #2788 and lots of pink fleece. The pattern sewed up easily enough, although it was tough to sew through so many layers of fleece since there is stuffing between two fleece layers.
When I put it on she HATED it. But, you know, she's two. Once we went to the first house and she realized what this Halloween business was all about she went from door to door proudly saying, "I Foofa! Gabba Gabba!"
I bought the classic. plactic jack-o-latern bucket (but in hot pink) and glued the remaining pink fleece around it, adding the Foofa scallops at the top. It was so easy and it made a cute addition.
Overall it was a success!