Slugger

Aaron is developing a troubling habit of hitting his sister. He gets
frustrated a lot, and his first instinct is to throw a tantrum; and
his second instinct is to bop Jada on the head. This happens a lot
when they're in the stroller together; Aaron wants something and can't
have it, or is just generally feeling cranky, so he'll try to throw
himself out of the restraints, and when that doesn't work, he'll turn
around and take a swing at Jada. Nothing seems to be getting through
to him that this is inappropriate, and we can't always physically
separate him from his sister (hence the difficulties that arise when
they're sharing space in our stroller). Hopefully, he'll learn
eventually; but for now, we get a lot of fussing from Aaron and a lot
of "Aaron hit me" from Jada.