Of course, you can. Maybe, the question shouldn't be "Can you do this?". Maybe, the question should be "Can you stand to look at someone else do this?".
I'm pretty sure Kate has no problem doing this, as well as a wide assortment of look-at-me-cross-my-eyes-this-way tricks. I'm also fairly certain that she has no problem looking at pictures of herself doing these tricks that make me cringe!
Oh, I don't worry that her eyes will get stuck that way. I know some people believe that old wives' tale, but that isn't what makes me cringe. I cringe because it's freaky weird to look into your seven year old's sweet face and see that eye-less eyeball where you know a beautiful light blue eye should be, ya know? Another freaky favorite of hers is the cross-your-eyes-then-make-one-eye-zip-to-the-outer-corner-by-itself dealio. . . yikes!