Geode Eggs from Martha Stewart

www.marthastewart.com/343344/crystal-egg-geodes

What student wouldn't enjoy making these colorful (egg) GEODES?
I have an actual geode which I showed my students--along with this poem:

Miss Peggy is a GEODE, or at least I think it's true

Her outside is round and bumpy--that was my very 1st clue.

She's been around a long, long time-her color is kind of gray
Just like an old GEODE you might find along the way.

Miss Peggy is a GEODE, or at least I think it's true
When you break inside and know her, her color will shine through.

Don't judge a person or a rock on the outside which you view,
For within that rock or person, may be some sparkle meant for you!