新奇的东西用英语可以说成 "novelty".
"Novelty" 来源于拉丁语 "novus", 意思是 "新的"或 "新颖的"。
下面是一些例句：
The novelty of the idea quickly wore off. (这个想法的新颖性很快就消退了。)
He was always looking for something new and exciting, always chasing after the next novelty. (他总是在寻找新鲜事物，总是追求下一个新奇的东西。)
The toy was a big hit because of its novelty factor. (这个玩具因其新颖性很受欢迎。)