Happy Birthday Building Set (2321-1) is a Basic Set LEGO set released in 1996 with 33 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing Basic Set sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 13 unique part types.
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Buying checklist
Quick context before you buy this set used or verify a marketplace listing.
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Release year
1996 (30 years ago — may be retired)
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Catalog scale
33 parts listed · 13 inventory lines tracked
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Minifigures
No minifigs in inventory (brick-only or Technic set)
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Build manual
No digital manual in our catalog — check the box tab or LEGO.com
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Gray era
Pre-2004 set — may use old light/dark gray instead of bluish gray
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Shipping weight (est.)
~98 g for parts inventory (excludes box/minifig packaging)
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Before you buy used
Run the completion checker, compare photos to the inventory, and check live listings for sealed pricing
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Market value
No estimate on BrickID yet
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Parts in this set
13 parts · updating…
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Duplo 2 x 2 x 2 Figure Brick, Spiky Bangs, Red Hair, Clown Make-up, with Button Suspenders Print2327c01pr0009 · ×1 · Blue -
Duplo Brick 1 x 2 x 2 with Three Balloons Print4066pr0108 · ×1 · Yellow -
Duplo Brick 2 x 23437 · ×5 · Yellow -
Duplo Brick 2 x 23437 · ×5 · Green -
Duplo Brick 2 x 23437 · ×5 · Red -
Duplo Brick 2 x 23437 · ×5 · Blue -
Duplo Brick 2 x 43011 · ×2 · Red -
Duplo Brick 2 x 43011 · ×2 · Blue -
Duplo Brick 2 x 43011 · ×2 · Yellow -
Duplo Brick 2 x 43011 · ×2 · Green -
Duplo Brick 2 x 4 x 2 Rounded Ends with Monkey Face Print4198pr9986 · ×1 · Yellow -
Duplo Brick 2 x 4 x 2 with 2 x 2 Square Arch6394 · ×1 · Blue -
Duplo Car Base 2 x 6 with Open Hitch End and Red Wheels2312c02 · ×1 · Yellow