A little OT -
One year DH and I had a couple of drinks while putting together Christmas gifts, and came up with a great idea. We wanted to put footprints in the snow outside the house of the sleigh and reindeer. We couldn't get our footprints in the snow next to the sleigh, so here's what we did. We took a troll doll, taped it to a yardstick, and stood on the porch, making imprints in the snow. It didn't look very authentic, but I can't remember when we laughed so hard!
Good luck with your footprints. Now that my kids are a little older, and ask way too many questions, I find the "less is more" philosphy works better.
Denae