Kids can create a great persuasive speech, proving that laughter is great medicine, by showing their audience in real time that their mood is improved after the delivery of a few jokes. For this speech, the speaker starts off with some of her best jokes, hopefully reducing her audience to appreciative laughter. From here, the speaker should easily, with the addition of some supporting evidence, be able to convince her audience that laughter is, indeed, great medicine.
Today's society claims to be growing more and more gender neutral, eliminating past boundaries that relegated boys to certain appropriate activities and girls to different ones. If the speaker creates through story or action the image of a boy playing with dolls, serving as the flower girl in a wedding or cheering for the local midget football team instead of playing on it, he could create some good belly laughs at the same time he makes a strong point about how many boundaries we still hold in our society. This speech potentially uses humor to make the point that, if these "switches" of roles seem silly, we still have far to go for true gender equality.
For this topic, the speaker opens with a humorous and hair-raising tale of, under penalty of dire consequence, a poor defenseless kid being "condemned" by her parents to "clean that nasty bedroom or else!" If the speaker's audience is also a roomful of kids, everyone will sympathize and find humor in this familiar situation. The humor can be amplified in this speech through taking the ironic and potentially even funnier position that it is every kid's duty to do this "cleaning" at the very last minute possible and only so that the surface appearance reads clean. In this way, the speaker creates humor and persuasion by advocating procrastination, marveling over the long-lost toy found under the bed, and building an abstract sculpture out of old gum wrappers.
For the health-conscious kid who likes to investigate behind the scenes, this is a perfect persuasive speech topic. But how to make it funny? By exaggeration, of course! This speech lends itself to exaggerating the harms of too much fast food. Fast food and other processed foods are known contributors to excess calorie, fat and sodium intake, which lead to weight and health concerns, both on the rise in young people. The speaker on this topic can infuse humor, while also underlining the dangers, by exaggerating the outcomes of too much fast food consumption.