Science Buddies is a non-profit comprehensive science project website with more than 1000 science fair project ideas and detailed instructions for hundreds of projects. Browse to find a project by topic area and grade level. Or use their Topic Selection Wizard which asks a series of questions about areas of interest, grade level, available time, and cost. It then offers a variety of suggestions for science fair projects. The section for teachers has classroom experiments and activities.
There are also suggestions for parents on encouraging your child’s interest in science and experiments and projects to do at home. Check out the tips for putting together a successful science fair project, and a forum moderated by science teachers and scientists for kids to get assistance and share ideas.