More than 30. All the usual (mum, dad, yes, no, more, mine, apple, toast, ball, car, shoes, socks, baby, balloon, door, knock, eye, ear, nose, arm, knee, doodle, chin, hair, foot, bye, hooray, chair, Nana, Pa, please) Ds2 is almost 19 months and I've noticed a speech explosion in the last 2-3 months. He has new words every day and is starting to put words together into 2-3 word sentences. My Ds1 was closer to 2 before his speech took off.