Thank you, Please and Are Doing?

Sam has started to say "Thank you Mommy" and "Thank you Daddy" spontaneously for many things and it just warms our hearts. He's also getting much better at saying please, though his new favorite phrase is "Are doing?" as in "What are you doing?" with all the inflection of the full sentence. He's also getting better at saying people's names, though the letter "L" still eludes him...

Singing

Sam is beginning to sing along to songs a lot now. He can get maybe half the letters in the ABC song and his favorites include "I've been working on the railroad" "Wheels on the bus" and "Twinkle twinkle little star." He also likes to sing along to many of the Wiggles songs we just got on CD (or "Iggles" as he calls them).