Sentence:  I walked him, pushed him, pulled him, and “<WSD>bubbled</WSD>” him, drawing the line at changing him, and found that the ability to bring actual happiness to another being's face, even such a small red one, simply by walking into the room, made me feel ten feet tall. 
Meaning of the word marked with <WSD> tags:  To pat a baby on the back so as to cause it to belch.