Is the MASTERPIECE Challenge Kit a regular LEGO set?

No, it's the official FIRST LEGO League competition kit, built for constructing mission models used in the robotics competition rather than sold as a standard theme set.

How many pieces does set 45823 include?

The kit contains 1,756 pieces across 442 unique parts, plus 21 included figures.

What colours appear across the kit's mission models?

White, black, blue and light bluish grey form the consistent colour scheme used throughout the kit's models.

FIRST LEGO League

MASTERPIECE Challenge Kit

Set 45823 MASTERPIECE Challenge Kit isn't a standard retail LEGO® set but the official competition kit for FIRST LEGO League. Its 1,756 pieces and 442 unique parts provide the building blocks teams use to construct mission models for the robotics competition, finished in a white, black, blue and light bluish grey colour scheme.

Set number: 45823
Year: 2023
Pieces: 1,756
Minifigures: 21
Theme: FIRST LEGO League
Different parts: 442

What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 442

As BrickLink list (XML)

Import on BrickLink: Wanted → Upload, upload the file (or paste its content), pick a Wanted List and add the parts.

Minifigures 21

Green Torso, Lime Legs, Dark Red Hair, Scarf fig-0155855 pieces × 1
Dark Turquoise Torso, Medium Azure Legs, Red Hair fig-0155864 pieces × 1
Kid - Dark Turquoise Torso, Medium Lavender Legs, Bright Light Orange Helmet, Black Hair fig-0155874 pieces × 1
Bright Light Orange Torso, Dark Red Legs, Dark Brown Hair fig-0155914 pieces × 1
Dark Blue Torso, Magenta Legs, Light Bluish Grey Hair fig-0155934 pieces × 1
Monochrome Bright Green fig-0156573 pieces × 1
Monochrome Bright Light Blue fig-0156583 pieces × 1
Monochrome Black, Hat fig-0156594 pieces × 1
Monochrome Reddish Brown fig-0156603 pieces × 1
Monochrome White, Tutu fig-0156614 pieces × 1
Monochrome Dark Purple fig-0156623 pieces × 1
Monochrome Dark Pink fig-0156633 pieces × 1
Monochrome Red, 28621 Head fig-0156643 pieces × 1
Monochrome Orange, 28621 Head fig-0156653 pieces × 7
Monochrome Blue fig-0156663 pieces × 1

Description

A competition kit, not a shelf set

Unlike a typical LEGO® set, the MASTERPIECE Challenge Kit is built for use in FIRST LEGO League, an international robotics competition for young people. Rather than one finished model for display, it contains the parts for several smaller mission models that teams place on a competition mat and interact with using a robot they've programmed themselves. With 1,756 pieces spread across 442 unique parts, the scope reflects that: several independent builds rather than a single large structure.

Several small builds, not one big one

The relatively high count of 442 unique parts for 1,756 pieces comes from the kit containing multiple, thematically separate mission models, each with its own shapes and mechanisms. That sets the Challenge Kit apart from typical themed sets built around a single connected model. For teams, that means working through several individual builds before the competition even starts, well before those models get folded into a robot strategy on the mat.

White, black and blue throughout

White, black, blue and light bluish grey run through most of the kit's mission models, giving the whole competition mat a consistent, technical look rather than a decorative one. That restrained palette is a deliberate departure from the bright colours of typical themed sets, since function and recognisability on the mat matter more than visual variety here. Sorting parts by colour before building is particularly useful with a set this size, since it makes it easier to keep pieces from different mission models apart.

442 parts and 21 figures

With 442 unique parts and 21 figures included, the MASTERPIECE Challenge Kit is one of the larger sets covered on this site by part variety. The full parts list on this page catalogues every element individually, which is useful for identifying a missing piece before competition day or for anyone rebuilding a specific mission model afterwards. For teams, mentors or collectors chasing spares, the list gives a quick way to check exactly which shapes and colours belong to this kit.

FAQ

Is the MASTERPIECE Challenge Kit a regular LEGO set?: No, it's the official FIRST LEGO League competition kit, built for constructing mission models used in the robotics competition rather than sold as a standard theme set.
How many pieces does set 45823 include?: The kit contains 1,756 pieces across 442 unique parts, plus 21 included figures.
What colours appear across the kit's mission models?: White, black, blue and light bluish grey form the consistent colour scheme used throughout the kit's models.