Obito is really great with kids as he can be both playful and protective when Kakashi's seriously terrible. It's not that he hates them or anything but he has a attitude thanks to what he treats them as adults, thinking that they're mature and smart enough to take care of themselves and not do potentially deadly things as he matured in very young age.
He couldn't be more wrong.
JE LEEST
Obito x Kakashi Headcanons!
FanfictieWell, title says everything. ^^" This is basically fandoms headcanon about ObiKaka relationship! (Headcanon = word describing something that hasn't happened in original canon but has happened in someone's head)