Acid-stained Concrete Patio -- Looks like copper! Click the pic for a brief how-to video on doing this technique. I'd love to do this, although I wonder if the acid stain is bad for those plants around the patio.
112 Cartoon Elements Make Learning The Periodic Table Fun
Alchemy Activity - free hands-on science activity for grade elementary kids. Part of a complete unit on Chemistry: Chemical Reactions & Properties of Matter. Meets Next Generation Science Standards (NGSS).