A roly-poly toy is a toy that you can play with by pushing it down and making it wobble back and forth. It's usually made of hard plastic or metal, and it's shaped like a small animal or a person. When you push it, it rolls over and then comes back up again, over and over.
Think of it like a bouncy ball, but instead of bouncing up and down, it rolls around in a circular motion. Some people call it a tilting or tumbler toy, because it tilts from side to side as it rolls.
The toy is designed to be fun and entertaining, but it also helps with coordination and motor skills. It's a great toy for kids to play with, and it's also popular among adults as a stress reliever or desktop toy.