Floor time fun!
Answer: As we've mentioned before in our floor time post, floor time is lots of fun, although you need to keep an eye on us to make sure so we don't eat anything we shouldn't. Floor time provides mental stimulation and exercise for your piggies, so we'd say it's pretty important. If you have a small cage (less than 10.5 square feet), floor time is even more important. Even if you have a large cage, it's still better to give us regular opportunities to explore new environments and run around, and shouldn't be treated as optional.
If you are concerned about your piggies using your carpet as a bathroom, you can put down newspapers or bath mats for easy cleanup. If you have additional concerns about your piggies running loose in your home (pooping under furniture where it's difficult to clean, areas where your piggies could get stuck or hurt, etc.), you might consider getting the largest pet exercise pens you can find and use it for floor time. Alternatively, you might consider using a room of your house that does not have carpet, such as your kitchen or bathroom, for floor time.