Many parents know kids often act like they are immune to the cold by never saying anything that might help cut short their fun, especially in the snow.
The cold isn't stopping 4-year-old Thomas from running around outside.
"We try not to stay out too long. We make sure they're all zipped up," Thomas' dad said.
Zipped up because we know kids lose heat from their skin faster than adults and they're less likely to go inside if they're having fun.
While playing outside, layers are most important.
The five parts of the body that is most at risk for frostbite are your ears, nose, cheeks, toes and ears.
Pediatrician Dr. Lisa Thebner recommends wearing wool in the cold because it is warmer than cotton.
"For hands and feet mittens are warmer than gloves. You also want water proof boots and insulated boots," Dr. Thebner said.
Check your child's fingers before frostbite sets in. Look for skin that is a little white or numb.
"In extreme cold you want to check on them frequently every 10 to 15 minutes to make sure no color changes," Dr. Thebner said.
Thomas makes sure his baby brother, Nicholas, is protected.
"Mittens and a hat and a little coat," Thomas said.
And of course, that cozy sleeping bag!
The rule of thumb for older babies and young children is to dress them in one more layer of clothing than an adult would wear in the same conditions.