Ariel's Magical Underwater Palace

Notable parts

• 2 moulds appear in no other set: Duplo Animal, Crab with White Eyes print (Sebastian); Duplo Figure with Hair Curly Reddish Brown, Lime Mermaid Legs.
• 5 parts come in a colour no other set has for that mould: Duplo Brick Round 2 x 2 x 2 (Medium Azure) ×8; Duplo Plant Bush / Tree Top / Rock Pile with 4 studs (Lavender) ×4; Duplo Plant / Leaf (Lavender) ×2; Duplo Plate 4 x 6 (Light Aqua) ×2; Duplo Plate 8 x 16 (Dark Purple).
• 8 printed parts are only in this set: Duplo Building Roof Spire 3 x 3 x 3 with Azure Starfish, Bubbles print (Medium Lavender) ×4; Duplo Brick 1 x 2 x 2 with Mirror print (Yellow); Duplo Brick 1 x 2 x 2 with Shell Music Box print (Light Aqua); Duplo Brick 1 x 2 x 2 with Yellow/Orange Fish print (Trans-Light Blue); Duplo Brick 2 x 2 with Tiara print (Trans-Yellow); and 3 more.
• 11 parts appear in only a few other sets: Duplo Flower 4 x 4 x 1 with 4 Top Studs (Medium Lavender) ×5 — also in 10418 Elsa & Bruni in the Enchanted Forest (all Duplo); Duplo Plant Vine 2 x 3 x 5 1/2 with Leaves and One End Stud (Bright Green) ×2 — also in 10416 Caring for Animals at the Farm (all Duplo); Duplo Brick 1 x 2 x 2 with Side Cutouts and Channel in Top (Medium Nougat) ×2 — also in 10411 Learn About Chinese Culture, 10469 Pizza Girls with Muffin and Bluey (all Duplo); Duplo Brick 2 x 3 x 2 with Curved Top (Yellow) ×2 — also in 10565 Creative Suitcase, 10887 Creative Fun (all Duplo); Duplo Plant Vine with Leaves and Two End Anti-Studs (Bright Green) — also in 10994 3in1 Family House, 45828 FIRST LEGO League Challenge 2024 - Submerged Discover Set; Duplo Brick 2 x 2 x 1 1/2 with Curved Top (Bright Light Yellow) ×2 — also in 10972 Wild Animals of the Ocean, 10446 3in1 Wild Animal Families, 10448 3in1 Animals on Wheels (all Duplo); Duplo Brick 2 x 10 x 2 Arch (Light Aqua) — also in 10956 Amusement Park, 10996 Lightning McQueen & Mater's Car Wash Fun, 10466 Train Ride with Grandpa Pig (all Duplo); Duplo Brick 2 x 4 Curved Bottom (Coral) ×3 — also in 10966 Bath Time Fun: Floating Animal Island, 10978 Creative Building Time, 10477 3 in 1 My First Creative Cute Pets, 10472 Animal Building Game (all Duplo); Duplo Plate Round 4 x 8 Semi-Circle (Bright Light Yellow) ×3 — also in 10922 Ariel's Undersea Castle, 10975 Wild Animals of the World, 10432 Peppa Pig Boat Trip, 45828 FIRST LEGO League Challenge 2024 - Submerged Discover Set; Duplo Playground Slide Curved Right 90°, Rounded (Medium Azure) — also in 10993 3in1 Tree House, 10453 Funfair, 10465 Mickey Mouse Clubhouse with Minnie & Pluto, 10464 Team Spidey Webquarters (all Duplo); Duplo Swing (Medium Azure) — also in 10864 Large Playground Brick Box, 45024 STEAM Park, 10914 Deluxe Brick Box, 10991 Dream Playground.
• 12 parts are otherwise only found in Duplo sets: Duplo Brick 2 x 3 with Curved Bottom (Light Aqua) ×4; Duplo Brick 2 x 2 (Coral) ×3; Duplo Brick 1 x 2 x 2 with Bottom Tube (Coral) ×2; Duplo Brick 2 x 3 with Curved Bottom (Bright Light Yellow) ×2; Duplo Brick 2 x 4 (Light Aqua) ×2; and 7 more.
• 2 moulds first came out in 2024, including in this set: Duplo Plant Vine 2 x 3 x 5 1/2 with Leaves and One End Stud ×2; Duplo Figure with Hair High Red, Light Aqua Shell, Medium Azure Mermaid Legs.
• 1 existing mould first came out in this colour in 2024, including in this set: Duplo Flower 4 x 4 x 1 with 4 Top Studs (Medium Lavender) ×5.

Calculated from Rebrickable’s public set inventories, excluding sticker sheets and spare parts.