Candy Experiments website... awesome science experiments to teach different concepts. Nothing helps teach science concepts better than food! ;)
Put real spiderwebs on paper... great way to preserve a spiderweb on paper to explore/look at
Science for Kids: Gummy Bear Science
Antartica from space by NASA
Gum drop engineering to build STEM skills - post has great tips on extending the activity too
Why Is The Sky Blue? Cool Science Experiment for Kids.
Science World facts. I love this kind of stuff!
Interesting Facts About Animals
meet your organs...love this site for kiddos
Skeleton-Cut out and put brads in to make your skeleton move.