I have Crossville Savoy in my kitchen, but on the backsplash. It seems very durable, but mine is a high gloss finish. I imagine it would be very slick when wet, so I would be careful to have a rug or mat by the tub.
Or does it come in a matte finish too?

I would think a child's bath is fairly light traffic. My kid's bathrooms are on the second floor, probably rarely see shoes and would have minimal dirt tracked that far from outside anyway. I think you'd be okay as far as traffic level.

I have this tile in my master bath in matte. Funny, I just answered your other post.

This is a very thick, high quality tile. I love it and how it looks in my bathroom. My bathroom is not small and I preferred to skip the border like they show in the brochure.

Just a heads up...this is a hand made tile and you will have larger grout lines and some grout lines will be larger than others.