The too-cute tot -- clad in a green t-shirt and gray shorts -- waddled his way over to the blue plastic pool, gurgled a few incoherent noises, and then jumped tummy first into the water.
Mike can be heard giggling off-camera before commenting, "Nice belly flop, buddy!" as Isaiah climbed out of the pool.
Seriously, just try not to completely melt after watching the Instagram video, below, which Carrie regrammed along with the caption, "Summertime splashes! #bellyflop"
We know, it's impossible.
Carrie and Mike, 36, are careful not to overshare pics of their son, but earlier this week, the 33-year-old country crooner did share a sweet, rare snap of her little man laughing as he looked up towards the sky.
"He soaks in the sunshine...and I realize that he is mine... I don't deserve such sweetness! #blessed #momlife," she wrote on Instagram.
At the American Country Music Awards in April, Carrie told ET that little Isaiah has been adapting well to life on the road.