1-Gravity Falls

2-Avatar The Last Airbender

3-Steven Universe(I like the relaxing ost, it's nice)

4-Adventure Time(I remember I watched it with my sister when I was a child before but I don't think we finished it. And I don't remember it was all a blur XD)

5-The Amazing World Of Gumball(IT WAS MY CHILDHOOD but I don't remember all of it.)