How do the interactions differ between smol Sam/human Dean and smol Dean/human Sam?

Starting with smol Sam and human Dean, Dean tends to be grabby but not casual, he’ll pick Sam up but only if it’s necessary. He’s more likely to let Sam get up on his own and tries to give him complete independence. Sam occasionally bosses Dean around, but it’s not often and he mostly leaves Dean to it.

With smol Dean and human Sam, the interactions are much more casual. Sam will poke and nudge, pluck Dean up and plop him on his shoulder. Dean will get used to getting moved around, and scolds Sam if he was busy. Dean will also be extremely bossy, making sure his giant little brother knows just who’s in charge, no matter how often Sam teases him by picking him right up in the middle of a tirade.

They’re an interesting crew, to be sure.

August 14th excerpt:

Jacob grasped the strap of his bag to keep it steady as he took another step back. The strange mechanical whine of the computer screen barely warned him before it lit up and his attention was drawn there instead. Lights on the panel glowed, and from this close he could hardly recognize what this cinema-sized thing was supposed to be.

“Uh. Looks like you have work to do. I should get out of your way,” he suggested, taking one more shuffling step away from the laptop that he guessed would soon be the center of Sam’s attention.

August 10th excerpt:

The rest of the huge M&M stayed in Oscar’s lap while he took a nibble of the candy. His eyes widened in shocked appreciation and he shot Sam a glance.

No wonder the other boy was so excited. It was good.

August 4th excerpt:

“Is that what we look like to you?” Dean asked as he saw the perspective of the humans trying to get ice from the machine, very nearly knocking the kids out of the fridge door.

Stan gave a small jump as the question broke through the trance connecting him to the film. He spared the human a glance, still huge and looming even in his lowered position on the bed. His arms alone were thicker than Stan was tall, and that was just a fact of the enormity of humans.

August 2nd excerpt:

The tines of the fork nudged at Sam’s arm, who barely even looked up at the threatening cutlery that could scoop him up into the air. “What, Dean?” he asked tiredly, a put-on air about him as he studiously focused on the shreds of hot dog and bread he had pushed into a facsimile of a hot dog on a bun.

“You gonna eat that?” Dean asked, jabbing his fork at the remainder of Sam’s portion of the meal.

July 24th excerpt:

“I’ve never heard there might be anyone else,” Jacob admitted. “I never thought about living on my own like this. Everyone kinda thinks I can’t.” He glanced down at himself pointedly. He was less than four inches tall, and couldn’t even get down from a table on his own.

Dean frowned at what Jacob was implying. He’d been raised to take care of Sam since he was only four, the idea of being told what he could and couldn’t do was an alien thought.

“Just because you lost a little height doesn’t mean you turned into an infant,” Dean said gruffly, holding out a hand for Jacob again. “Fine, you’re smaller than me. But you can do things I can’t.”

July 15th excerpt:

Sam stumbled to his feet, his neck craned back in an attempt to keep John’s face in sight. He nearly tripped over the edge of the handkerchief Dean was snuggled in, stepping back to look up at John’s immense height.

“You’re tall! ” Sam proclaimed, looking impressed at how high up John’s arms stretched overhead. From down on the nightstand, the giant doctor looked like he could touch the sky.

June 28th excerpt:

“Doesn’t exactly seem safe, running around in a room like that when I don’t know you’re there.” Sam held out the silver bullet that was pinched between his fingers, his last test unless he found some iron sitting around in the motel room. “See how this feels.”

“Yeah, because this is so much better than hiding,” Jacob muttered under his breath. He leaned skeptically away from the thing Sam held out to him so he could take a safer look at it. The shiny metal reflected his skepticism back at him in a warped image. Pinched in Sam’s huge fingers, the thing could almost disappear.

It was familiar, but Jacob couldn’t immediately summon up what that shape might mean.