thumb prints made into Christmas lights. Easy craft to do with the kids. To enhance this, I might extend the strand each year, so by the time they are older, you have a long string of thumb print lights.
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.