"We just happened to be in the same city as the 'biiiigggggggest T-Rex' ever found. We had to make a trip to see it in honor of River," Amber wrote. "This dinosaur was discovered in FAITH, South Dakota by a woman named Sue. And he died by a River ♥️."
"Open your eyes and you will see signs all around you. We think just maybe, Riv is having the best time of his life in Heaven with this [dinosaur]."
Amber continued, writing that getting back on the road and into daily life without her youngest son as "not been easy in the slightest."
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"Every single thing reminds me of him, and all I can think about is how he would love exploring and seeing all that we are seeing. I see his name everywhere, I see little red-headed toddlers everywhere. I miss his silly personality and his bright light. I see his face in our other kiddos," she wrote.
"I have this pit in my stomach constantly, because I'm trying to make life as normal as possible for our other 2 incredible kiddos, London and Lincoln, while hurting so bad inside," she continued. "I look around at everyone else and wonder if anyone is going through something like we are."
"Dumb little things don't matter anymore. My family does. My faith does. We've got this, because God's got us. Thank you all for your continued support, prayers and love. It really does help us so much," she concluded, using the hashtag #livelikeriv.
Amber and Granger broke the devastating news earlier this month, after their child drowned at their home in Georgetown, Texas. Last week Granger announced that he would return to touring, but would not be doing any meet-and-greets.
"Don't feel sorry for us because we feel very blessed we had an incredible little boy for three years," he said.