Hi Ben over here in the UK our school crossings are patrolled by what we call "lolly pop ladies and men" whose job it is to safely cross children to or fro from school stopping the traffic with only a very large lolly pop.
I was hoping that you could come up with an LED version of something very eye catching to children and motorists alike and may even incorporate an audio tone and colour changes for when its safe to cross.
Thanks. Doug