"Maybe go around a building? In a way that wouldn't work if there were cables?" she suggests.

Sure, they can do that!

They lap the building quite low down and quite fast. Seems like the one controlling the not-broomstick is a bit of a speed demon.

And the kid's parents?

… Possibly that couple who have just left Boots, looked up at the not-broomstick, and then promptly ignored it.

They seem to be shouting something. Possibly a name.

Tyler notices. "– Do you think those are the parents?"

"Probably. For the heck of it, have Flower make a path for them?"

Theo hands him the card

And then Tyler makes a path!

The parents look briefly confused, look over, and then follow when they see Tyler waving (and their kid, perhaps it's the kid who made them come over).

"Hi! So we're proving magic is real and to do that we're letting people fly on our pink flying staff. Your kid wanted to fly. It's very magically safe." She gestures at the whooping teenagers.

"… I don't think that would be a very good idea," says the father. "He – he usually doesn't like heights. Tommy?"

The kid starts to look a bit uncertain.

"...if you're afraid of heights you probably shouldn't fly."

"… I guess."

His father picks him up – he's probably a bit large for that, but not by much – and says, "Sorry about him wasting your time."

The mother comments, "I'm curious how you're doing this, though."

"Oh it's actual, real magic, we're recording this to send to the Randi foundation but you can feel free to ask for a demonstration."

She looks around at the crowd and opts not to, right now.

Other members of the crowd would like more of a demonstration, though!

They can demonstrate! What, exactly, would they like to see?

They don't know what else can be done!

… One of them asks if they can cure genetic conditions.

"...probably yes, but we don't know how to yet. Erm, things we can do are like moving things and changing things and conjuring things and going through things and destroying things..."

The one who asks nods and leaves it at that.

Someone else asks to see them going through a thing! … Ooh like what about the crowd wouldn't that be spooky.

So Sadde uses the Through on Theo.

And then Theo walks through the crowd, especially that person who suggested it!

The crowd is appropriately spooked.

"Now go solid again to prove you're a real boy."

He makes sure he is not intersecting anyone or anything and then does so!

… A couple of the people nearest him do in fact poke him to check he's real. Which, he is.

Then, from another part of the crowd: "Can you do ice cream?"

"—possibly! Let's see..." She makes up a sufficiently verbose spell for ice cream and then—

—voilà! She has an ice cream cone.

The girl who asked takes it! "– Uh, do I need to pay you for this?"

"Nah, free of charge, but I can't give everyone ice cream 'cause magic that doesn't involve the magic cards costs mana."