I know it's a little late but here are a few pics.
Our pumpkin. I had to keep it simple because Willa "helped." She loved squishing the guts.
I bought her a costume at a garage sale last spring. It's 18-24, but it's already too small lengthwise.

So we went to Goodwill and she found an Elmo costume for only $4. She loved it.

She did great trick-or-treating. The first house, she took the candy out of the pumpkin and stared at the lady. LOL. I put it back in her pumpkin and went on to the next house. She did the same thing again, then asked me to open it. I don't blame her! Who gives a toddler food/candy and then tells them they can't have it yet? After a few houses she got the hang of it. After we were done, we went over to my grandma's house. We went up to the door and my mom gave Willa some candy. We went in and I started taking off my coat. Willa went back to the door and wanted to leave and go to more houses. LOL!

And poor Rupert, who was thoroughly unimpressed with his costume.