"Mahler is not for children"
I totally disagree with that thought. Children, like animals, have little or no resistance to what they're exposed to. I've never seen an animal leave a room because Mahler was on. But more to the point, I'm opposed to the almost pandering, "don't teach them to swim in the deep end of the pool", attitude towards what's appropriate for children. I was raised an only child and my parents treated me as though I were another adult in the room. When I got to school, I had almost no idea what a children's story was. As a result, I was bored by them. While my parents certainly didn't play Mahler symphonies, I was totally comfortable with Beethoven, Sinatra, Dave Brubeck, Peggy Lee and other things that are allegedly for adults only. I knew Tom Leher and Johnathon Winters albums - even if I didn't get ALL of the jokes. Sure, I liked some Disney stories and Disney music, but I was just as comfortable with what my parents collected. I don't think it would have been much different with Mahler.