Mermaid and the Rainbow — Lois June Wickstrom

Maia's Imaginary Friend is a Mermaid. Her best friend Fig can't see her.But Fig and Trezzie both love science. Trezzie loves to collect trash that people leave on the lakeshore. She keeps her finds in her treasure box. They come in handy for learning science. Maia, Fig and Trezzie swap science tricks using treasures from the mermaid's secret box. Best of all, they make a rainbow with a mirror, a piece of paper, and a glass of water.Together, they make a great team.