Texts which used to be (maybe still are?) used in Irish schools. Free, downloadable text files (audio files also exist, at least for Book 1):

Anseo is Ansiud - Book 1: http://www.gaeilge.org/AIA1

The link to the free, downloadable audio files for Book 1 seems to be broken, but I have the files themselves, if anyone wants them (just message me and we can figure out how to do that). If anyone finds a working link, please let me know.

Anseo is Ansiud - Book 2: http://www.gaeilge.org/AIA2

Anseo is Ansiud - Book 3: http://www.gaeilge.org/AIA3

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I'm not a native (or entirely fluent) speaker, so be sure to wait for confirmations/corrections, especially for tattoos.