Trezzie is a mermaid. She likes pretty things. And she thinks ice cubes are beautiful.

Maia and Fig are having a picnic by the lake. Fig brought ice cubes for their lemonade. But Fig can't see Trezzie. Trezzie is Maia's imaginary playmate. Maia makes Trezzie a necklace by blowing holes in the ice cubes. Trezzie can't help blow the holes because her breath isn't warm. Fig gets jealous, when Trezzie swims away with the ice cube necklace. Fig jumps in the lake to get it back. Then, she nearly gets a leg cramp, and nearly drowns. Will Fig believe in mermaids after Trezzie saves her life?

Watch both girls learn water science and see Fig start to trust her friend's imagination.