Mermaid and the Water Magnifying Glass

Maia's best friend is named Fig. Maia's imaginary playmate is a mermaid named Trezzie. One of Trezzie's treasures has a pattern on it. Is it art, or something else? They need to look with a magnifying glass. Maia shows the mermaid how to make a magnifying glass with a drop of water and a plastic veggie box she had among her treasures.