-peanuts
-cashews
-dandelion greens
-cheese
-chickweed
-alfalfa
-lettuce
-carrots
-apple bits
and...
-corn bits
you should avoid them eating:
-raw beans
-tomato greens
-apple seed
-parsley
-pinapple
-oranges
You should also worrying about their food trays. Here are some helpful tips:
-Some hamsters like to sit on their trays. Avoid that by giving them a ceramic or metal tray.
-Make they water bottles stationary by attaching a copper wire at the end to connect the cage.