Pet hamsters are known for their playful and curious nature. They exhibit behaviors such as running on their exercise wheel, digging and burrowing in their bedding, grooming themselves, storing food in their cheek pouches, and exploring their surroundings. Hamsters are also nocturnal animals, so they are most active during the night. Additionally, they may display territorial behaviors, such as scent-marking their cage with urine or creating nests in secluded areas. It's important to provide hamsters with a stimulating environment and proper care to ensure they exhibit healthy behaviors.