I’ve just been introduced to this site, Waiata Mai! It has songs for play, everyday situations, and there are 40 videos you can download so that you can play the songs offline.
Check it out. I’ll be posting the link permanently in the links section of this site. Singing is one way we can introduce te reo Maori to children. Our class has learned the seven stars of Matariki this way, and are also learning te maramataka through song.