Learning to Sing

Jonah has been practicing singing lately.
Yesterday in the car, I had the country music station on and Jonah was in the back going "La lalalal lalala". I asked what he was doing and he said "singing!"
He can also sing "Twinkle Twinkle" in it's entirety but usually waits til he's alone in his crib to do it.
He makes requests for me to sing certain songs like "Baby Mine". He then can sing "Baby Mine don't you cry..."