"What do you need boy robes for?" inquires Madam Malkins.
"I'm sometimes a boy," the girl explains.
"What?"
"Look—"
They're early enough they find an empty compartment. Sadde puts his stuff in the appropriate places.
Anthony does likewise! Then takes a seat and holds the door open in case anyone wants to join them.
"– I think it's technically allowed on the train, but not really recommended?"
So he grabs it, moves his wand, and says, "Wingardium Leviosa!"
The frog flies from his hand—
And hits a girl who was just about to walk in on the forehead, making her drop onto the floor with a thunk and an "Ow!"
"Sorry, was practising magic and, er, accidentally sent a chocolate frog at you."
"Chocolate frog?" She looks for it and finds it, the little pentagonal box. "Ooh, can I have it?" She gets up and starts pulling her luggage inside.
"– Yeah, the spell was meant to make it go up, don't worry. Sure, you can have the frog."
She beams, takes a seat, and starts opening the little candy. "I'm Willow! I'm a muggleborn."
"Yeah, we can! I failed, it was supposed to float a thing, I dunno what I did wrong."
"Huh."
She unwraps the chocolate frog and—
—it jumps, of course. "Eep!" she says, throwing the box away.