Sierra had already added in the poppy seed, so she picked up her wand and aimed it toward her cauldron. "Dilapsus!" she said, with a brisk jabbing motion. She took the balloons she'd collected then used a baster to fill them. She tried to move as quickly as she could, not wanting to move too slow and mess something up. In her mother's class, at that. She'd never hear the end of it...

After she'd filled and tied five balloons, she pointed her wand toward her cauldron once again. "Evanesco!" she said. She looked around the room, making sure no one had missed that last step. There was no gas around here, right?