The five junior Lego building teams, along with their celebrity partners, are challenged to build a specific Disney environment that also includes power functions.

Each team has five hours to build a vehicle and their celebrity teammates' stunt double out of LEGO bricks; the teams send their brick-built stunt double and vehicles off the launchpad and complete an epic action movie stunt.

The remaining teams must build uncommon common rooms for the legendary Hogwarts Houses; the teams and celebrity companions create structures that reflect the world of Harry Potter encompassing secret passageways and whimsical house characteristics.

Each team are tasked with building an incredible dragon, and the winning team are revealed.