This is what I say to Audrey anytime she does something that makes Abigail laugh.
I was making lunch when I heard Audrey jumping in the living room (she's been really into jumping lately.) Then I heard Abigail laugh...which was weird because usually she just makes a lot of noise. I walked to the doorway and saw Abigail looking at Audrey and actually laughing at her when she jumped.
Poor Audrey, lol. I must have made her jump about 40 times.