We haven't gotten much of the white stuff here yet this year, and we all have a case of cabin fever due to self-induced house arrest (we have yucky colds), so I took the plunge and made my own snow. I saw the idea here.
Measure 4 cups of flour.
Add 1/2 cup baby oil.
(hold the bowl so your son doesn't dump the whole thing on the floor - which is where we should have started anyway!)
Thoroughly enjoy yourself for over 30 minutes!
And the cool part is that it cleaned up rather easily. I just had to let go of the messy part during play. And besides, it smells good!