So, my grandson demonstrated his ability at the age of 5 near 6 to wink with either eye. Now I can wink with my left eye but not the right but being consumed with envy of his superpower skill, I have now learned how to wink with my right eye. Admittedly it involves pulling a weird grimace but it's getting there!
I'd prove it with a selfie but the last selfie broke the lens! Instead I give you the amazing winking grandson