If something is singsongy, it sounds like singing and has a rising and falling pattern.
Singsongy can make people think of happy or childish things.
Examples:
Her voice is very singsongy when she talks.
The children sang a singsongy song.
The teacher read the story in a singsongy way.
The cat's meow was very singsongy and funny.
The bird's chirping was so singsongy, it sounded like a little concert.
The wind made a singsongy sound as it blew through the trees.