Not with ADD, but you said others could join in... hope it's okay.

My friend and I were talking and walking, and after a while I began to blur out her words. Nail polish is not a topic I am particularily passionate about. As I stopped to look at the sky, my mind still fuzzy, I smiled and announced, "Yogurt!" Naturally my friend shot me a curious glance. "What are you talking about?" was an expected question, and after that I finally snapped out of my daze, explaining with a sheepish look on my face. "Clouds are white, and so is vanilla ice cream. Kaito likes ice cream, and across the street is frozen yogurt. Yogurt is also white, and therefore, yogurt." Though it made perfect sense to me, she still appeared vry confused. Shrugging, she continued to babble, and as she did, I began to admire the violet-blue flowers on the side of the road. "Social Studies..." "...What?'

Sorry if this isn't exactly that funny. My manner of writing seems to not come off very humorous.