Ariel's Undersea Castle

Notable parts

• 1 mould appears in no other set: Duplo Figure with Hair Swept Right Red, Azure Mermaid Legs (Ariel).
• 4 printed parts are only in this set: Duplo Brick 1 x 2 x 2 with Bottom Tube and Three Singing Fish Print (Trans-Light Blue); Duplo Brick 2 x 4 x 2 Arch with Seaweed, Starfish, and Bubbles Print (Medium Azure); Duplo Brick Round 2 x 2 x 2 with Shell and Bubbles Print (Bright Light Yellow); Duplo Disk with Xylophone and Starfish Print (Bright Light Yellow).
• 7 parts appear in only a few other sets: Duplo Plate Round 4 x 8 Semi-Circle (Dark Pink) ×2 — also in 10877 Belle's Tea Party (all Duplo); Duplo Plate Round 4 x 4 (Yellow) — also in 10921 Super Heroes Lab (all Duplo); Duplo Animal Fish with Large Eyes and Stripes on Top Print (Flounder / Fabius) (Yellow) — also in 10515 Ariel's Undersea Castle, 10420 Ariel and Flounder's Café Stand (all Duplo); Duplo Support / Umbrella Stand with Square Base (fits 92002) (Dark Pink) — also in 10844 Minnie Mouse Bow-tique, 10873 Minnie's Birthday Party (all Duplo); Duplo Brick 2 x 2 (Glitter Trans-Light Blue) ×2 — also in 10899 Frozen Ice Castle, 10934 Creative Animals, 10422 3in1 Space Shuttle Adventure (all Duplo); Duplo Plant / Tree / Seaweed (Trans-Green) — also in 10907 World Animals, 10910 Submarine Adventure, 45029 Animals, 45825; Duplo Plate Round 4 x 8 Semi-Circle (Bright Light Yellow) — also in 10975 Wild Animals of the World, 10432 Peppa Pig Boat Trip, 10435 Ariel's Magical Underwater Palace, 45828 FIRST LEGO League Challenge 2024 - Submerged Discover Set.
• 6 parts are otherwise only found in Duplo sets: Duplo Plant, Flower with 1 Top Stud (Coral) ×2; Duplo Plate 2 x 4 (Light Aqua) ×2; Duplo Plate 2 x 4 (Bright Light Yellow) ×2; Duplo Brick 2 x 3 (Medium Azure); Duplo Playground Slide Curved Right 90° (Medium Azure); and 1 more.
• 6 existing moulds first came out in their colour in 2020, including in this set: Duplo Plant, Flower with 1 Top Stud (Coral) ×2; Duplo Plate 2 x 4 (Light Aqua) ×2; Duplo Plate 2 x 4 (Bright Light Yellow) ×2; Duplo Plate Round 4 x 4 (Yellow); Duplo Plate Round 4 x 8 Semi-Circle (Bright Light Yellow); and 1 more.

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