Over 1,200 free science projects searchable by subject, difficulty, time, cost and materials. Browse the library or let us recommend a winning science project for you!

Below is a list of the 1251 science fair project ideas on our site. To help you find a topic that can hold your interest, Science Buddies has also developed the Topic Selection Wizard.

Explore our favorite experiments, engineering challenges and demonstrations with these fun hands-on STEM activities! Materials are easy to find, most activities take an hour or less, and the STEM …

Try your hand at building cool devices and exploring amazing reactions with these sixth grade science experiments.

Browse our collection of free science experiments which are easy to set up, and perfect for home or school.

Science Buddies' fourth grade science projects are the perfect way for fourth grade students to have fun exploring science, technology, engineering, and math (STEM).

Discover the perfect middle school science experiment in this huge collection of age-appropriate science investigations.

To find other projects you and your student would enjoy, browse the complete library or use the Topic Selection Wizard to see a list of recommendations that match up to your interests.

Discover the perfect middle school science experiment in this huge collection of age-appropriate science investigations.

Each experiment is fast to set up, uses household materials, and provides lots of fun, discovery, and learning. Browse our library of science experiments for more fun ideas.