Jacob and Claire were Luke and Leah Skywalker (note that Leah wanted to carry a light saber). One day after Kate and Liam were at Alice's house, they returned home wearing cute pumpkin costumes that Alice had used with her own kids, so they went as pumpkins.
Things have been very busy over the past few weeks, both at work and at home, so we weren't sure if we were going to carve pumpkins this year, but Jared realized that it would be worth it, if for no other reason than so this year wasn't remembered as "the year we didn't carve pumpkins." Jacob chose a baseball, and Claire chose a self portrait of her missing teeth.
In the background of this picture, you can make out, to the left of the baseball and directly behind the baseball, 2 enormous pumpkins grown by Kate West. Last year, she gave Jacob and Claire pumpkins, and Jacob commented that they were quite small, so she decided, "I'll show Jacob," and she grew a couple 50 pound pumpkins! Kiddos wanted to carve those, but the parents decided that would have been way too much work this year.