TMBG are a great band. You can't tell if they are singing adult music or infant music. Like the Beatles, they can appeal to anyone with an open mind for good music.
I've been a TMBG fan for a long time, so I was very pleased to find out they now make music for kids. I was hesitant when I bought "Here come the ABC's". My 4 yr old son has been such a big fan of elmo, I didn't think he would make the switch. Now all we listen to every day is TMBG. He loved it so much I bought "No!". He loves this one too! I especially like their use of vocabulary that doesn't talk down to kids. I often find myself listening to this CD long after I've dropped my son off at pre-school.