It's no longer Friday, but...
she has way more than 4 signs, so I won't bother trying to list them.
Newest ones she's started signing are bird, butterfly, hat, and dog.
Ones we're working on are... umm... more than four?! LOL. Sun, moon, stars, socks, cat, bathroom (toilet), and probably a few others. It's starting to become normal for me to throw signs in all over the place.
I'm thinking about maybe starting to work on grass, bubbles, and various other garments besides socks, hats, and shoes.