Ten is a great age! Well, the first challenge for her is to make a list of science topics that she finds interesting. From that list she can be interviewed on each topic, drawing out more specifics about her interests. The interviewer, if perceptive enough, may be able to draw out what REALLY interests her. Once that is nailed to everyone's satisfaction, the next challenge will be for her find a question that she will be able to answer in a scientific way, that is, by recording observations over time and seeking patterns that could suggest an answer, or by actually doing tests whose results might be used to answer her question. Your role as parent is NOT to find a topic for her to investigate, but to facilitate her thinking so that she comes up with something that she really wants to know herself.
Part of the student's learning experience is the power and responsibility of choosing their own Science Fair Project. Follow these steps to find some good science fair project ideas that your daughter can select from.
First, read Successful Science Fair Projects, a short article by Lynne Bleeker here on EDUCATION.COM for some good advice. Lynne writes, "A successful science fair project does not have to be expensive or even terribly time-consuming. However, it does require some planning and careful thought."
Next, read Science Fair Project Ideas where you can use a drop-down menu to browse projects by grade and/or specific subject area.
Then, go to Discovery Education - Science Fair Central
On this website, you will find a clear pathway to help students develop and present successful projects.
Finally, check out Science Kids, where you can find a wide range of science fair projects for kids as well as ideas that will help challenge and guide children through whatever subject they investigate.
If she like plants and or nature she may like growing a TickleMe Plant. I have grown lima beans in my class but nothing compares to grow a TickleMe Plant from seed and watching how the leaves fold together like magic when you Tickle it. Every student was surprised to see this pet like plant in action. You can ask her why the TickleMe Plant moves when Tickled. She can experiment how the plant reacts to tickling just one leaf at a time or how it reacts when you blow on it. If she wants to become a TickleMe Plant expert, she can read the TickleMe Plant book. In fact all of the products come with experiment ideas.