My husband, 
Mufasa LOVES this. He loves the smells and sounds of the outdoors, and he has taken to this toy like a fish in water. He and I even created a little game where we race each other back and forth. I run on the side of the tents and tunnels, and he runs through the tunnel. We've done this multiple times and he just gets so excited. 😍
I work from home, so I tend to get stuck in front of a computer ALL day for endless hours. My husband knew that I needed a little push to go outside more, so he bought this for me. It's so much fun to go outdoors now, with my cats, and spend some time in the sunshine. If you're like me and tend to get cooped up all day indoors, I highly suggest that you take at least 30 minutes a day to step into the sunshine, walk on the green grass, and breathe in the outdoors. It will do wonders for you.
As you can see from this next picture, Mufasa loves the cat tents a lot more than Bilbo. Bilbo's pretty much never been outside, so he spent the whole time crawling like he was in a military battle, with his stomach on the ground. I'm hoping that over time, he gets a little more used to this.
If you want to buy this for yourself, you can get it on Amazon here. Note that I have an affiliate link there, but if you want to use a non-affiliate link, here ya go.
I just had to write this to thank my husband. :) He's such a wonderful guy and was so creative about this idea, which will be lifting my spirits every day and giving me a great excuse to go outdoors. :) Have you found a good excuse to go outdoors every day too? :) Life is tough sometimes, so you should do something special for yourself or establish a little tradition that brings joy to your life every day.