We listed ways that bacteria are harmful and ways that they are helpful. This gave us a chance to talk about personal hygeine too- great little health lesson.
They colored pictures of the three most commonly shaped bacteria and we talked about how they are a one celled organism. We use our Usborne Encyclopedia of Science to get some facts on them and what their names are. Usually these books have great internet links managed by Usborne so they are up to date with good links. Sometimes they have video or just a great kid's page of information.
I have no idea why this picture won't load correctly...we also talked about viruses and how they are different from bacteria.