Ferrets just love hammocks. You can find many online and in pet stores around the world.
One you get your hammock you can usually clip it inside your cage and they are fairly easy to set up. After you have it up the ferrets will rock themselves to sleep!
When choosing a ferret hammock be sure to not get one that is too big. If you have a small ferret and get a large hammock they may get stuck and feel trapped and wont fully enjoy it.
Be sure to clean your hammock and check it for any damage ( holes worn out etc.) as to make a safe environment for your ferret.
A bored ferret is an unhappy ferret, so you'll want to make sure that you offer them a reasonable selection of toys. Supplying them with a bunch of ferret toys, though, shouldn't break the bank. Ferrets can be happy with some rather ordinary items as toys. When selecting ferret toys, you will need to consider things like suitability and durability. All this means is that you need to take your pet's size and needs into consideration. And, for sure, you'll want to make sure any toys can stand up to their sharp teeth. Because it is a certainty that your ferret will chew whatever he can get his little mouth around. You may be able to find the right kind of ferret toys by looking through the cat toys section at your local pet store.