One of the songs on Paekakariki sisters Amelie and Sofia Lloyd's music album Bizarre is a charity song with money going to Greenpeace.
The song is called Save the Maui Dolphin.
"We've been asking people to donate money towards the song," said Sofia, who is seven years old.
"There are only 55 Maui dolphins [over one year old] left in the world," added Amelie, who is nine.
Both girls were very proud of the six song album, which has had input from other people.