Minecraft Challenge Ideas for the Stream?

My buddy and streamer colleague xD Marlin gave me the task of looking for a challenge for Minecraft version 1.16.3, and I thought you might be able to help me. Write here all the challenges that you can think of, that you want to see again or that have never existed before! Come up with something funny, exciting, time-consuming and stupid and take a look at Twitch xD

There are plugins from BastiGHG where you can play his challenges.

(BastiGHG is a famous German streaming and youtuber)

They're really fun.