This exercise is perfect for getting your students to talk about old trends and fads and using intermediate/advanced vocabulary, such as

• to be all the rage
• to have a wild popularity among...
• spread like wildfire
• Picture this: a world where everyone embraces [...].
• Are you ready to join the movement and be a part of something truly special? That's what [...] offers.

You need more input about trends and fads? Here's a PowerPoint and worksheet with which you can introduce your students to the topic.