Minecraft Story Mode:Endercon Building Competition

Endercon Building Competition [sic] is an event and a location in Episode 1 of Minecraft: Story Mode.

Description
The event is held every year. It consists of teams creating their builds. The winner's build gets featured at EnderCon and the team gets to visit Gabriel. There are at least five booths. Right after the entrance there is an empty large chest. The protagonists' booth is the fifth one.

Quotes
Jesse after opening the large chest: "Hmm... Nope."