Two-liter pop containers can be fun if you know how to use them. Filling them
with water is the obvious choice, letting your ferret tip it over, making a mess
in the process. That's not going to work for everybody since not everybody likes
soaked carpets.
If that's not an ideal way for you to entertain them, try this. Get some
coins, pennies or quarters will do, and put in just enough to cover the bottom
of the bottle. Put the cap on tightly so they can't get it off. Even better,
tape it up as much as possible. That keeps them from choking on the cap or
coins. Once introduced, they should have a blast rolling and knocking it over
while the loud noise from the coins makes it all intriguing.
Old clothes
It doesn't really matter what you offer them: shirts, coats, shoes, pants, or
hats all qualify as entertainment to a ferret. They can tunnel into all of this
and destroy it at will. They'll rarely have more fun than this.
Be wary of zippers, rubber (especially on the shoes), buttons, and pockets.
They could find something you forgot in a pocket or chew anything else. Make
sure you've looked over anything you give your pet, and that goes for everything
else in this article too.
Blankets
Simply laying a blanket across the floor is usually enough. They'll
immediately take to crawling underneath and searching, even if it's over an area
they're in every day. Try to avoid a thicker one with tears as they can get
their little heads stuck and nothing good comes from that. Avoid electric
blankets and anything with frayed edges. It's easy for them to get their nails
caught (even if they've recently been trimmed) and get seriously hurt.
Cups
Not exactly the most fascinating thing when you only have one of them, but
get together a stack of them, and you're suddenly the best ferret owner in the
world. Simple Dixie cups are enough as long as they're stacked high and wide.
Almost nothing can match the pleasure of 30 cups crashing to floor at the hands
of a ferret. The obvious precautions apply (no heavy cups, nothing with sharp
corners, no glass, and supervise at all times).