Scientists once thought that the sponge was a kind of plant. In fact, sponges are some of the world's oldest animals! Readers will be amazed as they explore the many secrets of the sponge, its life cycle, and its many uses in the modern world. Children are keen observers of the world around them. This series helps kids understand the scientific basics behind their everyday experiences. Through simple, clear text and colorful images, these books provide the tools children need to start thinking like scientists! Additional features to aid comprehension include a table of contents, a phonetic glossary, sources for further research, and an index

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