"Yes, I want to make phoenixes too, but somehow I think they may count as living things."

Paint, crushed eggshells, a prism, salt, chicken feathers, an eyedropper, pine needles, an acorn, garlic cloves, sharp bits of wire, a knife...

This time Slughorn calls on him first, when it's time to go over their ideas.

"I'm compleeeetely making it all up, here, but what I wanted was a prismatic egg, or something, so. I was thinking I'd do something like completely cover the egg in paint, and then use enough the same colour of paint to sorta glue the crushed eggshells on the prism? And also paint it. So there'd be a prism covered with crushed eggshells painted the same colour as the actual egg. And then, erm, something to indicate that I want to make the prism be inside the egg and shaped like an egg? What I thought was waiting until the paint dried, and then filling the eyedropper with something, maybe water, then holding the prism above the egg, and dropping whatever on the prism so that it'd fall from it to the egg. Erm, yeah, that's it." And he grins.

"Haphazard," says Slughorn. "But not actually likely to be dangerous. You may try it provided your 'whatever' is water and you choose a color other than red."

"Why, what's the problem with red?"

"You might attract a result which had more to do with blood," says Slughorn.

"Oh. Fair, I guess," and partially answers one of my questions.

Miranda's decided to aim for the decorated wooden egg, but she wants a nested wooden egg, so she's incorporated a lot of repetitive steps and will be miming carving the shape of the egg with the knife around the shell. She is planning to roll the shell in various paint colors all mixed up for, hopefully, divinatory style results on her Matroyshka eggs. Slughorn approves her procedure and moves on.

So Sadde starts covering his prism and his eggshells in blue paint, using enough of it for the shells to get glued onto it and also completely covered by it.

"What exactly are you envisioning a prismatic egg as being?"

"I dunno! Sorta like an egg-shaped... crystal thing? Maybe with lots of, like, inner facets or something to divide light. I dunno, really, I wanna see!"

"You might get something else, your procedure's kind of random."

Shrug. "This is the closest thing to science we've had yet, it's fun."

"Because we all know that science is about making weird art projects and seeing what unrelated objects they turn into?"

"And then writing that down and trying it again until you get it right, in order to generalise principles from that!"

"It's still not that much like science." Carve carve.

Miranda rolls her eggshell gently in paint droplets. "No control group, sample sizes of one..."

"Well, it's not a psychology experiment, I'm pretty sure—" Pause. Blink. He raises a hand.

"Mr Woods?"

"Are these processes deterministic? Like, if I try the same thing twice, do I always get the same result?"