Marleigh and I did this last year for Daddy! Used this idea to make two valentine crafts/gifts. I used a paintbrush to put the paint on the feet first. Footprint Heart Valentine's Day Keepsake Grandparents Gift for Valentines Day.
Is the weather not cooperating with your spring plans? If you're still in need of some fun activities for your kids that don't require a trip outdoors, check out this fun spider web game you can whip up in no time.