Scientific Method Project Idea Websites 

• Science Buddies

• Education.com Science Fair Projects

• National Geographic Kids Science Lab

• NASA Space Place

• Science Fun for Everyone!

• Steve Spangler Science Experiment Library

• PBS Kids Design Squad Global

• Exploratorium Science Snacks

• Scientific American: Bring Science Home

• Little Bins for Little Hands Science Experiments

• Already have a science topic in mind? Do a Google Search for, "Elementary science fair project about (topic)"

Engineering Project Idea Websites

• Science Buddies

• PBS Kids Design Squad Global 

• TeachEngineering.org K-5 Engineering

• DiscoverE.org 

• Instructables - K-12 Engineering

• Makeyland Project Collection  (There are lots of pop-ups and a bit of a learning curve, but these project ideas are great!)

• Already have an engineering problem or invention in mind? Do a Google Search for, "Elementary science fair engineering project about (topic)"