Sandwich and water
Beth: [age 4] "Mommy, can I please have some of your sandwich?"
Mom: "Yes, you can have one bite." [hands Beth the sandwich, of which Beth takes a bite]
Beth: "Here you go, Mommy." [hands back sandwich] "Can I please have a drink of your water?"
Mom: "Yes, you can have a sip." [hands Beth her water thermos, from which Beth takes a sip]
Beth: "Here you go, Mommy." [hands back thermos] "Thank you."
Mom: "You're welcome! And you said that very nicely."
Beth: "Okay, but when I was drinking, I also put some of your sandwich in your water."