This is my third book from this author. I like her concepts, introduce science to little children her books. The illustrations are bright and neat, and it helps both children and adults realize that science exists in the nature and you can do experiments with very simple tools and you do not need a laboratory.
Trezzie, the mermaid, collects trash which people leave on the shore. When she meets Maia and Fig this time, she is interested to know more about the rocks which has some unusual markings on them. Maia and Fig ,use a plastic fruit box and help make a magnifying glass for Trezzie. Trezzie uses the glass and together they find out that the rocks are actually fossils. The discussion then leads to what Fossils are.
It is a very interesting book to read for both children and adults. I am enjoying reading the books with my boys. I would recommend it to everyone.