WHAT THE HECK DO I BUY THESE PEOPLE?

So, yeah, Christmas is coming up. We actually have money to buy people gifts this year unlike previous ones, and we've already agreed with most families whether we're buying something for them or not.

But then you've got my dad's side of the family, and my aunt always asks my brother and I what we want, and usually gets us things along those lines which is awesome, but like this year I don't even know if we should get them something.

This sounds really stupid, but yeah. They have two eight-year-old girls and a sixteen-year-old I think, and my aunt and uncle. Like, I know what I could get the girls, but they already have tons of stuff, and know tons of people who will buy things for them, so I don't know. I know some things that my aunt is into, but I don't know what my uncle or other cousin likes. So are there things we can buy for the whole family? Because like I'm stuck as to what to get and we're seeing them in a week and I just feel like a jerk for not encouraging my dad to go out and get stuff for them and because I feel like I come across as ungrateful for my presents and what not ugh.