Exercise
It is important that your Hamster can exercise.
If you want to provide a wheel it MUST be big enough so the Hamster doesn't bend its back when inside it must have a solid floor rather than rungs.
Place the wheel in the cage for a few hours to avoid overexercising.
Hamsters love climbing hang sisal rope so they can climb and gnaw.
Make an exercise yard using a cardboard box with bedding on the bottom. Drop in toilet roll tubes, and fruit tree twigs.
Keep an eye on your Hamster make sure it doesn't escape.
Hamsters like to look under, hide in, or climb on to cardboard boxes/baskets/plastic flowerpots. Small pots and plastic pipes make hiding places and tunnels.
Change items around to provide interest.
Piles of twigs natural wood to make platforms to explore or rest. Hamsters will chew wood keeping their teeth trim
hide food and the occasional treat in an toilet roll tube/yoghurt pot/different areas of the cage, so your Hamster will hunt for its food keeping it occupied.