One of my favorite baby dolls was Ideal's Baby Crissy.
The best part about Baby Crissy was that you could make her hair long just by pulling her ponytail out, and then you could shorten it just by pulling a string on her back. And she was such a big doll, you could dress her in real baby clothes!
Not to be outdone, Mattel came out with "Growing Up Skipper" a few years later. Skipper was a young teen doll, whose arm you could turn to make her grow taller and (gasp!) make her grow a chest!
The weirdest of the 1970's dolls, though, had to be Lazy Dazy by Ideal, maker of Baby Crissy. She slowly fell over and fell asleep!