This idea didn't come from me. It has been borrowed from a teacher I worked with years ago. I took her idea and changed it a bit. I have also adapted it based on whatever I want to teach that year, which makes it great.
So even though this project may be difficult to connect to the real world and the question math teacher get the most "Why are we doing this", it is a lot of fun for the students. Yes , it is based on candy which immediately gets their attention.
I have used this to teach bar graphs, circle graphs, central tendenciesExcel, theoretical and experimental probability and even stem and leaf plots. The kids really seem to enjoy it and are generally interested in the results.
Here are the basics - bring in a box of Smarties or a bag of skittles. Some students bring in huge family size bags but only an individual package is necessary. There job is to graph the different colours that occur in the candy package. Using probability I will ask them the chances of reaching in and grabbing a red one. Or have them experiment on how often a red one comes out. Yes it is silly but the kids get into it and learn because of the candy. The display that they put together will have four graphs. The graphs open up and underneath the student explains the style of graph on top. The can explain the data or explain the purpose of that style of graph.
Examples: I have done this a few times and so there are different styles here