Okay, two months ago some missile (possibly Russian) fell near a children's hospital and zero children died in that sad incident. It is impossible to remain silent in the face of such a horrific war crime by Russia, so let's talk about it again. 
Ok, I got your point. You would be more happy if there was 50 or 100 children killed. And FYI, there was at least 2 casualties confirmed, including one doctor, I'm not even talking about injured ones. OK, let's say it was Ukrainian rocket,how it didn't killed dozens of children? Or implying that that hospital was empty, or it wasn't even hospital building. I don't get your flawed logic.
If I show you a recent video of Ukrainian soldiers torturing Russian prisoners captured in the Kursk region with electric current, does that mean that all Ukrainian soldiers are war criminals? I don't think so. But some Ukrainians do commit war crimes. Probably some Russians, too. That is inevitable in armed conflicts of this scale and intensity.
I cannot validate your claim, it may or may have not ever happened.
However, there is a pattern by Ruzzia of hitting civilians, there is a pattern in hitting schools and hospitals and shopping centres - it is not a one off. There is one guy called Andrew Perpetua. Him plus his reduced team has probably seen more videos of the war than anyone else. This person has stated many times that Ruzzians are systematically hitting civilian vehicles with drones, clearly not carrying anything but ordinary people for target practice in Kherson.
Tell me, was the recent strike by two Iskanders on a training center for UAV operators in Poltava with many casualties a correct operation or also a war crime?
We are not talking about Poltava, but how Russian bombs, missiles, and so on fly into residential buildings, there are plenty of records when the missiles themselves fly. Not the debris from the air defense, but the missiles and bombs themselves. And in general, do not forget that on February 24, 2024, Russia crossed the border and became the aggressor.