Pill bugs and Sow bugs are not exactly the same species, but they are often confused. They also are not insects, but instead, small crustaceans. Most people, as children, played with these "Rolly Polly" bugs. They are harmless and provide beneficial decomposition of plant material. But, when they come into the house, they can be bothersome.

Pill Bug or Rolly PollyRolly Polly / Pill Bug