I walked to school with other kids starting in kindergarten, when I was five. But, I don't think five years old is a "toddler".

At the slightly busy road in front of the school there were swing out stop signs. I've never seen them anywhere else. Sixth graders manned the stop signs. They stood on the curb and pulled on a handle that would swing the overhead stop sign out over the road. A third kid walked out with a handheld stop sign after the cars stopped and then the kids crossed.

Something happened and that ended. They switched to an adult crossing guard. I'm guessing it was something bad.