Yes,they are hyperactive and persistent.They will chew all the things you can think of,including paper,screws,pencils,slipper,my mouse,scales,and sometimes eat up erasers.....
It's not as if they NEED to run around that much.Even if you play with a dog for 30 mins in a day (running around,catching her,fetching thingsetc) it will be enough for them.
But the best part is that they are really "cutttieee" and affectionate.They can understand when you are not in a good mood or are depressed.