K and B have always played well together. I should bottle up whatever they have and sell it to people because it's much nicer having them play together than fight together. Need examples? You can check out proof here, here and here for starters.
Sadly, the dollhouses, Barbies etc have been put away for awhile. We just came off of a 4 day weekend though and I was anticipating the "I'm bored" by Sunday. (What is up with I am bored? I haven't been bored since I was..... hmmm..... never!) They threw me a curve though and the next thing I knew they were doing a photo shoot with each other. I guess they needed new Facebook photos. They set up the family room with a bench, lights, and props (guitar, giraffe, dolphin). I offered to take the pictures and they said, "NO, we can do it". They even had "costume" changes.
250 photos later, we were laughing while checking them all out and a Sunday afternoon was saved from the "I'm boreds"!