Cloud inspector (science for kids, weather activity)
Eggshell Geode. This is an eggcellent (pardon my pun) lesson!
make an edible DNA model
Erosion: "The Great Race" (This experiment shows children the effects weather has on erosion... water, glacial, and wind). From The Mailbox
meet your organs...love this site for kiddos
Brain Hemisphere Hat (made of paper)
Backbone (simple model) Spell Outloud Homeschool
A whole unit full of experiments for the human body!
Transparent, Translucent, Opaque