Dad or daddy, depending on the child.
Me, I'm mom- to my oldest,
mommy- to my youngest or when either one wants something, mother- when they want to annoy me,
mother dearest- when my oldest really wants to get on my nerves.
For some reason when I was a teenager I started calling my mom Ma. I don't know why I did that. mom was mom, dad is dad, daddy when I was younger.