"TAP, TAP"

This Sunday, October 21st, we were in a restaurant with Uncle Joe, Grandma M, Grandpa M, super-mom, super-dad and a friend. Uncle Joe was holding Isabella while feeding her for the first time.

They were sitting next to super-dad. She was eating carrots and apples. This was the first time Uncle Joe fed her, everything went well, she ate great! Uncle Joe had her sitting on his right leg, and her arms were free to do whatever they needed. Apparently that meant that for every bite, she would reach out and tap daddy on the arm. It was hilarious. Spoon in food, mouth open, bite in mouth, "TAP, TAP" on daddy's arm. Most of the time, she wouldn't even make eye contact with her target. She would just reach out and "TAP" daddys arm.
We couldn't figure out any reason for it. But she ate about 1/2 of a 2.5 ounce jar of carrots, and about 3/4 of a 2.5 ounce jar of apples, and for the whole of her meal, she felt the need to "TAP" daddy's arm

QUICK UPDATE:
We can:
wave goodbye/hello
say "bye", say "hi"
say mama
pull up to standing
dance
sign more, eat
make faces (copy your silly faces)
comes to you when you call her