Science for Kids: Overnight Crystal Garden - Babble Dabble Do (uses epsom salts) Lots of great science experiments
Kids' Science: Dancing Frankenworms - Playdough To Plato cut gummy worms into quarters, soak in a baking soda/water solution for 15 minutes, then drop into a cup of vinegar. Very fun to watch!
A simple science experiment to show why leaves change color in the fall. One of 5 Awesome science experiments for kids! You probably already have everything you need. (Large group or small group).
Chemical Reaction-apple science experiment - What keeps them from turning brown?
Science Experiment: Science Fair: Solar Heating and Designing of a Solar Cooker
Out of all the egg science experiment you can do dissolving egg shells should be at the top of every child& to do list (a visual and tactile STEM project)
Eggshell Geode DIY for Kids! Find out how crystals grow inside a geode in this fun science experiment