This is a wonderful way to allow students to present material. It can be used in a variety of ways.
I use it as a culminating activity after studying nonfiction text features and exploring a variety of nonfiction text. Students pick a topic of interest and come up with four questions pertaining to the topic. They then research using books and online resources to find answers to their questions. After researching, they create their museums. Their museums must include pictures, photographs, and other nonfiction text features (like text boxes, captions, maps, etc.).
This does take a bit of knowledge about PowerPoint formatting. My fifth graders usually have some minor issues that are easy to fix, but I highly recommend creating and formatting your own museum first before having students do so. If you are not very knowledgeable about PowerPoint, I would not suggest using this with your students.