1) Theme: Hammock Day (22 June)
Participants will build a building that looks relaxing and comfortable, like a resort, or a shack near a seashore etc. or even a fair!
The only rule is that it should include one or multiple hammocks

Time: It will start at 22 June at a specific hour and each participant will be given exactly 60 minutes to complete their builds.

2) Theme: Vegetation
Participants will build a building that must include plenty of plants and vegetation inside or outside (or both).
Vegatation can be presented in any style or way, such as a casual garden, or a greenhouse, or a forest that runs over the house etc.

Time: It will be done on a specific day and each participant will be given exactly 2 hours to finish.

3) Theme: Two Worlds Collide
As you can understand from the title, participants will build a building using materials from two different worlds such as Overworld/Nether or Nether/End or however they want.

Time: It will be done on a specific day and each participant will be given a hour to finish.