Warning: the following story is pretty much guaranteed to make you cry.
In October, Ashlee Hammac suffered a parent's worst nightmare when her five-day old son, Ryan, died of a brain dysfunction known as Hypoxic-Ischemic Encephlopathy.
To help her other son, three-year old Tucker, remember his brother and pay tribute to him, Ashlee constructed a sandbox directly next to Ryan's grave.
A photo of Tucker playing alongside his late sibling's tombstone has gone viral on Facebook.
"The more I thought about it, the more I wanted something my other son Tucker could be incorporated in," Hammac told People. "He always goes out there with me, and sits out there, and sings lullabies, and talks to him just like he was there.
"So I wanted it to be special for him too. His favorite thing right now is trucks."