informative speech topic..

Informative speech - give the audience some useful information.
You should pick the topic you familiar with. Or you should interest on it. For example: If you love to eat "fruit", you can talk about "fruit". Orange can give you the Vitamin C which help you to build up your body to avoid the sickness. For Apple, an old saying" An apple a daily, keep the doctor away.".......
You should think about what your audience would like to hear. Do some research and write your speech.
Hope it helps.