Here's a fact-finding worksheet all about the famous naturalist Charles Darwin. It's a great introduction to a project for younger children.
Charles Darwin Worksheet
Here's a worksheet that's ideal for older children learning about science and famous scientists such as Sir Isaac Newton, Charles Darwin and Stephen Hawking.
Asking questions about the world around us is how many scientific theories begin, just like when Isaac Newton asked why the apple fell downwards and he ended up discovering gravity!