Lots of kids like to run across a field of freshly fallen snow just to see their tracks. Put a twist on this activity by having your kids create animal tracks. Check a field guide out of the library and let them study what different animal tracks look like. Then they can use different tools (wooden spoons, spades, empty spools, or whatever you have around the house) to recreate the tracks on your lawn. They might be able to trick neighbors into thinking a deer has run across their lawn.