Here are some tips and ideas.
1. Coordinate but don't matchy match.
This photo shoot was based on the outfit Miss Blue was wearing.
Next, we went to a local park. I got the kids out and set them a ways from me and then I just told them to walk toward me and I click click clicked. The whole photo session took about 5 minutes. They all turned out so spontaneous and cute.
3. And...embrace the railroad tracks as long as you can park your van on the tracks and there is no danger of an approaching train. Like there will never be a train that day.