There are so many costume ideas for a Jack. This one was just particularly fitting yesterday. Yes, that is a real black eye.
Pants: pattern from Handmade Beginnings blogged here and here
Suspenders: tutorial from Make It and Love It (super easy, highly recommend)
I tried to get a picture of all the kids in their costumes. Instead I have a ton of pictures of silly faces, hands in the face and babies running away... here's a few favorites.