grandma's visit

My mom lives in another state and she came to visit us for a week.

When she arrived, my four-year-old son, Andy, told her, "I sure am glad to see you, Grandma. Now Daddy will do the trick he's been promising us."

Grandma was curious. "What trick is that?" she asked.

Andy replied, "He told Mommy that he'd climb the walls if you came to visit."