Education.com, Science Buddies and Science Kids are good places to find science project ideas for kids. These sites have science project ideas for kids of all ages in many different areas of scientific study.
Education.com has a list of science fair ideas that is divided into school levels. Users can select for kindergarten, elementary school, middle school or high school-aged students, as well as specifying what area of science they wish to investigate.
Science Buddies has a lengthy list of science projects organized into categories such as chemistry, electricity, geology and even human behavior. Each project is presented with a list of required materials and instructions.