color wheel umbrellas with fingerprint rain. Not sure what kind of colour wheel this is, but I like the concept. I find it helps for future concepts to always have the complementary colour directly across from it's mate.
Silhouette collage art lesson: students used flashlights to trace each other's silhouette. After cutting them out, the covered them with magazine clipping that described their personalities and interests.
leaf shapes in the Montessori class room came via Elizabeth Caspari, Maria's friend and personal secretary. Madame Caspari's father was a botanist and she was homeschooled due to a childhood foot surgery that went poorly, though she walked later.