I find that having fun in the snow with the kids always turns into great memories.
Today we made four lighthouses of snow balls, a fortress for a snowball fight (of which there were "many") as well as a horse to ride on. The horse was "an all girls project", while the boys were doing the more boisterous stuff.
We even took the time to remove all the snow from off the trampoline, and all the while I was under attack and was hit a number of times, to the great amusement of my kids of course ;-)
Unfortunately, the photos do not include our youngest son. Instead, a friend of the girls snuck in and "took his place".