Dolphins - This unit study has sections for children of various ages from preschool to high school. The unit study covers dolphin anatomy, reproduction, echolocation, species comparisons, social behavior, and coloring pages.

Water - This unit study covers how much water humans need, where water is on the planet, the water cycle, water chemistry, changing states, and vocabulary words.

Seeds - This unit study covers what is a seed, seed identification, drawing seeds, seed anatomy, germination, how animals help with germination, seed dispersal, and a seed experiment.

Polar Bears - This is a preliminary release of a polar bear unit study. There is some good stuff in here, but it is also missing a few chapters. it covers Taxonomy, Anatomy, Habitat, Polar Bear Myths, and has a pile of coloring pages in it.