Plymouth Township Police Officer Brad Fox was one day away from turning 35 when he was shot and killed in the line of duty four years ago.
The Marine veteran, who survived two tours in Iraq, left behind his wife Lynsay and their children, Kadence and Brad Jr.
His family makes sure to always remember the fallen officer on his birthday.
In a Facebook post, the family writes, "Another year has passed and our tradition of sending daddy balloons in heaven has continued."
In the video, Kadence and Brad Jr. sing 'Happy Birthday' to their dad and then send balloons up to the sky.
When asked where the balloons are going, Kadence says, "They're going to Daddy."
The kids then blow kisses up to their father.
"Catch it, Daddy," his daughter says.
View the video on the Officer Brad Fox Memorial Facebook page.