It's extremely likely that DS2 has broken his 2nd toe. (next to big one)
A&E? Leave it? strap it up?
He is using his foot semi normally, it's bruised on the "knuckle" part as well as on top of his foot. He has sensory issues and cancels out pain v v well so its hard to tell how much pain he is in although i can tell he is in some.
That toe is misshapen anyway but slightly more so than the same toe on the other foot.