What kind of execise do hamsters need?
They need to run free in a room maybe every 3rd day or so. Let them run around without disturbing them too much while you see that they don't chew on chords and stuff. Half an hour or a quarter will be enough. Inside the cage you can give them a running wheel or whatever it is called, but some hamsters go crazy from using it so maybe you should have it in there a limited time every day. They also like to climb around on branches and rocks and such things.
depending on your hamster, some hamsters do need to be brushed. long haired hamsters such as teddy bear hamsters need to be brushed at least a few time a week. if they have really long hair its good to brush then everyday or every other day. on the other hand, dwarf hamsters do not need to be brushed because they have short hair but you could bush them if you wanted too.