my kids would have made a snow gauge for our yard. It would be beautifully hand-painted, and show the snow depth to the 8th of an inch. It wouldn't need to show the metric measurements because, of course, my kids could do the conversion in the blink of an eye, barely thinking about it.
But, since I am not a really good homeschool mom, I can only say that we received about 18 inches of snow today, the biggest snow my kids have ever had in their own backyard.
Our lack of a snow gauge isn't stopping us from enjoying it.