My girls have never had a theme to their room, but starting this weekend we will be putting together LO's big girl room and it's going to be horses! She doesn't know it yet but I think she will be excited. It's really just horse bedding and a horse canvas for now, but we will add to it if we find some other cute things in the near future. LO2's room is just painted green with accents of aqua, it's actually quite boring but we will give her a theme once she gets into something in a year or two.