My phone is disabled because my daughter entered the wrong passcode too many times. How do I make it so I can enter the correct one?

It's fully disabled and says to connect to iTunes which I've done but I don't see anywhere that will let me reset the passcode or enter the correct one as she says that she entered it over 11 times & had to wait a couple hours or something between times that she entered it. I see where it says that I can totally reset my phone but I've never backed it up to my computer or anything and don't want to lose everything on it.