Incorporate interactive activities such as games, crafts or other hands-on material. Young children especially benefit from interactive activities.
Discuss the topic with kids, rather than lecturing the whole time. Don't let one child dominate the discussion.
Add humor. Tell a joke or funny anecdote about your topic to get the kids' attention.
Relate your personal experience surrounding the topic. Explain who you are, and share your unique expertise.
Leave something behind with the kids and their teacher, if applicable. Souvenirs keep your presentation fresh in kids' minds.