Cat Fun Play Tent

Pros: Sturdy, colorful, fun
Cons: None so far
My cats got this for an early Christmas present this year.  They LOVE it.  It hasn't had much use yet so I can't say how durable it will be, but it seems sturdy and is holding up with four cats running in and out of it.  It comes in a plastic pouch so it can be folded up and put away, but I don't think we'll be putting it away any time soon.  Now they're using it for napping, too.

I couldn't find a U.S. distributor for this particular tent.   Here's the UK link: