I think it's just fascinating. My daughter (she is only in 2 weeks in the school) watches TV and I listen to "listen" to the CD on. After half an hour she says to me: "Is Mama's, 6 plus 4 is 10". I ask her how she comes out and she says that was but as sung before. For me that was already equal to one more reason to buy the CD. When the CD was because she could sing the song Plus already equal. The texts are easy to understand and the music funky. Strong buy recommendation !!! and thanks to the kids who have taken the trouble to sing the CD. Great Idea.