KANSAS CITY, MO -- The babies at the neonatal intensive care unit at St. Luke's Hospital in Kansas City, Missouri, prove you're never too young to go trick-or-treating.
Check out the photo gallery above of the babies dressed as Captain America, a butterfly, a Kansas City Royals player and more.
In addition to the costumes, the babies received crocheted, candy-filled pumpkins to get them in on the trick-or-treating fun.
The families also received a "trick or treat, smell my feet" card with the newborns' tiny footprints and a Halloween book.
ABC News reports the positive response has prompted plans to celebrate the 12 Days of Christmas in the NICU.