I've noticed toddlers wearing foam head protectors, like boxers or hockey players, but we just live with the bruises. Tripped over his feet, as near as I could tell. Usually they do this a day or two before you have an appointment for pictures!
That level of protection is usually reserved for those with special conditions, such as a problem with bleeding, or a failure of the plates of the skull to bind together properly. Most kids can expect to bump their heads a few times.
One gets a healthy appreciation for avoiding it at a very early age. What I find amusing is the reaction of adults in the area when a collision is imminent.
"Watch your head!" They say.
I never could figure out how a kid was supposed to do that.
Mine used to give themselves hair cuts. We had some pretty funny school pictures.
I'm off to run the morning errands, see y'all later.