Be sure to give them plenty of variety of foods and treats . They need to be able to hunt, gather, choose, and sort to keep themselves mentally stimulated. A bored hamster or gerbil will become an ill hamster or gerbil. Hamsters are very active. They're also nocturnal which means that they like to sleep in the daytime and play and run at night.
Exercise burns off excess energy and calories.
It also stimulates the intestinal tract and makes digestion easier. Always provide your hamster with some means to exercise to stay in good health. The average lifespan of hamsters is from 1-2.5 years. See our words of caution about bedding and nesting materials as well as medications you can keep on hand in case of illness. The maze adds lots of exercise in a convenient space.