| Image | Item No. | Description |
| 42108-1 (Inv) | Mobile Crane 1292 Parts, 2020 Catalog: Sets: Technic: Model: Construction |
| 41719-1 (Inv) | Mobile Fashion Boutique 86 Parts, 2 Minifigures, 2022 Catalog: Sets: Friends |
| 10791-1 (Inv) | Mobile Headquarters 169 Parts, 5 Minifigures, 2023 Catalog: Sets: Super Heroes: Spidey and his Amazing Friends |
| 31153-1 (Inv) | Modern House 931 Parts, 2 Minifigures, 2024 Catalog: Sets: Creator: Model: Building |
| 60396-1 (Inv) | Modified Race Cars 351 Parts, 2 Minifigures, 2023 Catalog: Sets: Town: City: Race |
| 10929-1 (Inv) | Modular Playhouse 130 Parts, 3 Minifigures, 2020 Catalog: Sets: DUPLO: DUPLO, Town |
| 60433-1 (Inv) | Modular Space Station 1048 Parts, 6 Minifigures, 2024 Catalog: Sets: Town: City: Space Exploration |
| 41288-1 (Inv) | Mojo Jojo Strikes 191 Parts, 4 Minifigures, 2018 Catalog: Sets: The Powerpuff Girls |
| 76128-1 (Inv) | Molten Man Battle 282 Parts, 3 Minifigures, 2019 Catalog: Sets: Super Heroes: Spider-Man Far From Home |
| 80012-1 (Inv) | Monkey King Warrior Mech 1594 Parts, 6 Minifigures, 2020 Catalog: Sets: Monkie Kid |
| 80008-1 (Inv) | Monkie Kid's Cloud Jet 503 Parts, 4 Minifigures, 2020 Catalog: Sets: Monkie Kid |
| 80013-1 (Inv) | Monkie Kid's Team Secret HQ 1898 Parts, 8 Minifigures, 2020 Catalog: Sets: Monkie Kid |
| 30562-1 (Inv) | Monkie Kid's Underwater Journey polybag 38 Parts, 3 Minifigures, 2022 Catalog: Sets: Monkie Kid |
| 80021-1 (Inv) | Monkie Kid’s Lion Guardian 751 Parts, 5 Minifigures, 2021 Catalog: Sets: Monkie Kid |
| 42199-1 (Inv) | Monster Jam DIGatron Pull-Back 218 Parts, 2025 Catalog: Sets: Technic: Model: Race |
| 42149-1 (Inv) | Monster Jam Dragon 217 Parts, 2023 Catalog: Sets: Technic: Model: Race |
| 42118-1 (Inv) | Monster Jam Grave Digger 212 Parts, 2021 Catalog: Sets: Technic: Model: Race |
| 42119-1 (Inv) | Monster Jam Max-D 230 Parts, 2021 Catalog: Sets: Technic: Model: Race |
| 42150-1 (Inv) | Monster Jam Monster Mutt Dalmatian 244 Parts, 2023 Catalog: Sets: Technic: Model: Race |
| 42200-1 (Inv) | Monster Jam ThunderROARus Pull-Back 232 Parts, 2025 Catalog: Sets: Technic: Model: Race |
| 60251-1 (Inv) | Monster Truck 50 Parts, 1 Minifigure, 2020 Catalog: Sets: Town: City: Race |
| 60402-1 (Inv) | Monster Truck 144 Parts, 1 Minifigure, 2024 Catalog: Sets: Town: City: Off-Road |
| 40404-1 (Inv) | Monthly Mini Model Build Set - 2020 10 October, Teachers' Day polybag 43 Parts, 2020 Catalog: Sets: LEGO Brand: LEGO Brand Store: Monthly Model |
| 40405-1 (Inv) | Monthly Mini Model Build Set - 2020 11 November, Kindness Day polybag 49 Parts, 2020 Catalog: Sets: LEGO Brand: LEGO Brand Store: Monthly Model |
| 40406-1 (Inv) | Monthly Mini Model Build Set - 2020 12 December, Human Rights Day Dove polybag 50 Parts, 2020 Catalog: Sets: LEGO Brand: LEGO Brand Store: Monthly Model |
| 10178-1 (Inv) | Motorized Walking AT-AT 1121 Parts, 4 Minifigures, 2007 Catalog: Sets: Star Wars: Star Wars Episode 4/5/6 |
| 60173-1 (Inv) | Mountain Arrest 286 Parts, 4 Minifigures, 2018 Catalog: Sets: Town: City: Police |
| 60174-1 (Inv) | Mountain Police Headquarters 633 Parts, 7 Minifigures, 2018 Catalog: Sets: Town: City: Police |
| 60175-1 (Inv) | Mountain River Heist 370 Parts, 4 Minifigures, 2018 Catalog: Sets: Town: City: Police |
| 88006-1 (Inv) | Move Hub 1 Part, 2019 Catalog: Sets: Power Functions: Powered Up |
| 70820-1 (Inv) | Movie Maker 423 Parts, 6 Minifigures, 2019 Catalog: Sets: The LEGO Movie 2 |
| 76118-1 (Inv) | Mr. Freeze Batcycle Battle 185 Parts, 3 Minifigures, 2019 Catalog: Sets: Super Heroes: Batman II |
| 71475-1 (Inv) | Mr. Oz's Space Car 316 Parts, 4 Minifigures, 2024 Catalog: Sets: DREAMZzz |
| 43174-1 (Inv) | Mulan's Storybook Adventures 114 Parts, 3 Minifigures, 2020 Catalog: Sets: Disney: Disney Princess: Mulan |
| 41937-1 (Inv) | Multi Pack - Summer Vibes 441 Parts, 2021 Catalog: Sets: Dots |
| 45006-1 (Inv) | Multi Vehicles 28 Parts, 4 Minifigures, 2014 Catalog: Sets: Educational & Dacta: DUPLO |
| 41933-1 (Inv) | Music 33 Parts, 2021 Catalog: Sets: Dots: Bracelet |
| 42653-1 (Inv) | Music Store & Apartment 471 Parts, 3 Minifigures, 2025 Catalog: Sets: Friends |
| 30673-1 (Inv) | My First Duck paper bag / polybag 7 Parts, 2024 Catalog: Sets: DUPLO: Basic Set |
| 30327-1 (Inv) | My First Duck polybag 6 Parts, 2019 Catalog: Sets: DUPLO: Basic Set |
| 30333-1 (Inv) | My First Elephant polybag 6 Parts, 2022 Catalog: Sets: DUPLO: Basic Set |
| 10977-1 (Inv) | My First Puppy & Kitten with Sounds 22 Parts, 2022 Catalog: Sets: DUPLO |
| 30332-1 (Inv) | My First Space Rocket polybag 8 Parts, 2021 Catalog: Sets: DUPLO: Basic Set |
| 45028-1 (Inv) | My XL World 474 Parts, 6 Minifigures, 2020 Catalog: Sets: Educational & Dacta: DUPLO |
| 70437-1 (Inv) | Mystery Castle 1005 Parts, 6 Minifigures, 2020 Catalog: Sets: Hidden Side |
| 41191-1 (Inv) | Naida & the Water Turtle Ambush 200 Parts, 2 Minifigures, 2018 Catalog: Sets: Elves |
| 42153-1 (Inv) | NASCAR Next Gen Chevrolet Camaro 672 Parts, 2023 Catalog: Sets: Technic: Model: Race |
| 41392-1 (Inv) | Nature Glamping 233 Parts, 2 Minifigures, 2020 Catalog: Sets: Friends |
| 76296-1 (Inv) | New Captain America Construction Figure 359 Parts, 2024 Catalog: Sets: Super Heroes: Captain America Brave New World |
| 75364-1 (Inv) | New Republic E-Wing vs. Shin Hati's Starfighter 1036 Parts, 5 Minifigures, 2023 Catalog: Sets: Star Wars: Star Wars Ahsoka |