Wall decor/paint colour?

Jullz ☀️

I got my 4 year old daughter this bed from Wayfair and she wants her room to be unicorn themed.

I made a board on pinterest with a few options that I liked/some decor I found:

Her bedding will be white (Beddy’s)

The walls were originally brown and we painted them white but does anyone have any ideas of wall art/decor we can add to make it less plain? All her furniture is white as well, it looks empty...