Bruno's Lesson and Demonstration
Bruno would have been really nervous and awkward at first, but with the help of his niece Isabela he would have started talking about their familia and the miracles. He would have explained each of their gifts very briefly, and then spoken about his own. He would have been willing to answer any question about it as best as he could, even if sometimes the answer was "I don't know".
Then, he would have offered to demonstrate for any volunteer. He would have warned them that they may not like what they see. He would let them choose if they wanted to sit within the sand and see for themselves, or outwith and be told about it / given the emerald plaque.
1 - Katarin, piloting a little shuttlecraft in space. Katarin sat within the sand to see it for herself. 2 - Robert Langdon, ripping a page out an ancient book in the Vatican archives. Robert sat within the sand to see it for himself. 3 - Prudence, transforming into a bear. Prudence sat within the sand to see it for herself. 4 - Sirius, falling off a broom and breaking his arm. This one he involuntarily blurts out in Spanish, it just jumps into his head because he's looking at so many visions back to back and his mental 'guard' is down. (Any Spanish speaker present can translate if they like!) He looks really tired, and says he needs to stop for today, after this one.
Each person can take their emerald vision home if they want to.
If anyone else wants a vision, comment below and simply say what it was. They will be slotted in before the Sirius blurting. I'll likely choose a cut off point so his head doesn't explode, but anyone he doesn't get to who still wants one, he'll offer to 'see' for them another day after coffee and rest.