We have been using a sign that is like turning a door knob in space in front of you to mean "outside". Blueberry likes to go outside for walks in the morning and she has started telling us that after breakfast she wants to go outside because that is her routine.
We have been using a sign for "drink" that is holding your hand in a "C" shape and bringing it to your mouth like a cup. Blueberry hasn't been able to do that yet, but instead she uses the sign for "eat" and then does a loud exhale like you make when you drink something refreshing "ahhh". This means "drink" to her.