Jess wabed the latecomers in and nodded to them, it was ok that they were late, he wasn't going to yell at them today about that. "That's right Ms. D'Eath," Jess said, feeling a little disappointed in the answer, perhaps he wasn't being clear. "Well, so we know what they are, physically... but I suppose I should tell you what they do," he said, perking up as he realised his mistake.
"Portkeys, as the name sort of suggests, are items that have been enchanted to provide passage from one place to another. It's sort of similar to apparition, however it's generally regarded as being a more pleasant way to travel, and is definitely more effective over long distances," he explained.
"However, like apparition, it is monitored closely by the Ministry, so for today I've had to get special permission to teach you this," he told them with a smile, pulling out his own pocket watch and nodding. "So, if you'll just look here on the table," he said, pointing at the items. "Can anyone hazard a guess which ones are portkeys and which ones aren't?" he asked. "Probably the most obvious characteristic about portkeys are that they have a slight blue aura to them," he added.