I chose to study New Mexico and the Carlsbad Caverns in October so we could also study bats and add them to the Hall Decorated for Halloween. The children were making "fans" so I showed them the draperies in the caverns. We decided they looked similar, so we added them to our 3 dimensional cave on the wall. The other stalactites and stalagmites were made out of crumbled and twisted paper. One of the kids even suggested adding popcorn to the ones that resemble the "popcorn" stalactites.