Dada!: I am excited about something, like hearing the Theme to Blue's Clues!
Gaga!: I hear a door opening.
Heidi!: Let's go outside. I like to stand on the porch and call the dog.
Thank you: I have got something in my hand.
NO! NO! NO!: Random conversation. Can also mean "yes."
Bye-Bye: People think I am cute when I say this.