This tulle ruffle was about the easiest thing to ever make. I bought a roll of tulle and measured 5x the window, the cut two pieces that size. Sewed two straight lines. I didn't even gather, because it bunched on the rod.
In case you couldn't tell the room is pink and green. (The quilt my mom made.)
Here are some other pink and green diy-s for her room.
Thankfully we repainted the room from that awful hot pint.