The five junior Lego building teams along with their celebrity partners, are challenged to build a selected Disney environment as represented by the characters they choose, they must also includes power functions.

The five junior Lego building teams and their celebrity partners must build amazing vehicles which will be launched over a ramp, and which will includes their star character who should make it over the ramp - if they want to stay.

The four remaining junior Lego building teams and their celebrity partners are each tasked with building a Hogwarts common room for one of the four houses that they are each assigned.

The three finalist Lego Masters Jr. teams and their celebrity partners sculpt Ninjago dragons with elemental powers based on the the character they select, they must also incorporate power functions in their build.