One of the best kept secrets of the South Sacramento area is a small, private school tucked away in the Lanai Shopping Center on Freeport Boulevard, neighboring the Sacramento Executive Airport, where it has existed in rented space for 21 years. Over the years, most of the shopping center tenants have moved away. Meanwhile, countless hours of parent, teacher and student work have gone into transforming a run-down property into a school with colorful classrooms and playgrounds. It has an understated entrance, but Camellia Waldorf School is an oasis for children. The kindergarten yard is home to Mr. Mountain, a big pile of dirt, and Ms. Sandy, a big pile of sand. There are climbing struct