I want to add more excitement to my hamsters every day life .
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One of the hamster balls or I had a play pen like thing but you HAVE to watch of they could get out. You could also, if your room,/a room isn't dirty and not a lot of things that they could hid under, let it roam around a EMPTY, CLEAN AND SAFE ROOM.
I used to make little assault courses for mine with open , upturned books, tubes etc and put a trail of food along the way when I was a kid.
A big cardboard box will make a great playpen. You can leave some treats, some hiding spots or even sit inside and let the hamster climb you.