Kiwi,

Thanks for the photo. What a smart kitty to be teaching you all about Windows 10.
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She is adorable. I didn't realize she is a tortoise and white, such a pretty girl.

That is impressive that the vet came around!

Definitely use MrsDs box idea. When I was fostering a kitten last I set boxes on their side so the flaps formed a wall with an "entry" the kitten could push through. I also cut a couple of holes to pop out of. My son called the resulting construction "box castle" and boy did the kitten have fun running in and out and knocking toys about inside. With two of them it will work even better.