Does anyone know where to find free Irish Harp sheet music?

My sister and I both play the harp. But in her school, one of her teachers would like her to play an Irish song on her harp for a school performance. I have some Irish music, but it is way too hard for her as she has been playing for only 4 or 5 months and I have played for 6 years. So if you know about any easy Irish harp songs that we could download for free for her, then that would be great! Please let me know ASAP! Thanks! :)