You decide that Chad's spent long enough being teased about his height, so you focus on Dan and shrink him down a peg. You decide 4 feet should be short enough for Chad to get some revenge. Dan shrinks down, and after a few seconds, his features start changing. His face gets all round and soft, and his arms and legs squish in, getting stubby. He transforms into a much, much younger kid, maybe seven or eight years old.
Chad is now standing by the fridge, and he pulls out a soda. "Here you go Dan," he says, handing it to the little boy.
"You're the best!" the little Dan replies, his voice high and boyish.
Chad smiles, looking genuinely happy. He seems to really enjoy being a big brother, though since Dan is his only sibling, you've never seen him as one before.
"Are you guys playing video games? Can I watch?" Dan asks.
"Actually, we were just going to go out and play some ball. You can watch that, if you want," Chad says.
"Yay!" Dan says. "But you have to win this time, Chad! Billy keeps beating you!"
"Okay, okay, I'll try," Chad says, laughing. "Come on Billy, let's head outside."
"Uh, yeah, okay," you say. You feel a bit disturbed as you follow Chad and his now kid-brother out the door. You didn't mean to make Dan into a little boy, you just wanted to get him back for teasing Chad. Still, Chad really seems to like having a kid brother, and Dan doesn't seem to mind being little. You decide to...