story: My son was nine when he figured out Santa Claus was not real. We were at a mall and I saw what he wanted for Xmas. I sent him to his mom and tried to buy the item. He saw me buying the toy and laughed. My son is an adult and likes to tell that story.
 selected sentence: He saw me buying the toy and laughed.
I buy the toy >Causes/Enables> My son sees me buy the toy