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2321 LEGO Duplo Happy Birthday Building Set thumbnail image

2321 LEGO Duplo Happy Birthday Building Set
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2321 LEGO Duplo Happy Birthday Building Set
  • Happy Birthday Building Set thumbnail
  • Happy Birthday Building Set thumbnail

LEGO 2321 Happy Birthday Building Set is a vintage Duplo set from 1996 valued at $23 for new and sealed sets, up 188% from an original retail price of $7.99. Annual appreciation has averaged 4.68% since release. Used copies are valued between $5 and $12 depending on condition.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Happy Birthday Building Set since March 2020. Medium accuracy
LEGO 2321 Happy Birthday Building Set is a Duplo Building Sets release from 1996, containing 32 pieces and 1 DUPLO figure. The set features a birthday theme with basic bricks in primary colors, a printed brick with three balloons, and a rounded element with a monkey face. It includes a yellow 2 x 6 car base with red wheels. The set was packaged in a medium box.

A new and sealed Happy Birthday Building Set is currently valued at around $23, with annual growth of approximately 3%. The average used price is $5 for those in good overall condition. Based on current trends, this set could be valued near $24 within the next year.
Happy Birthday Building Set is a relatively rare set. We have not seen set 2321-1 for sale in primary or secondary markets for over 6 months. Its market value is likely somewhat higher than our estimate. The last brand new Happy Birthday Building Set was sold on eBay.

For Sale (New/Sealed)

There are currently no new/sealed listings available for 2321 Happy Birthday Building Set at this time.
All regions

For Sale (Used)

 (US) Used - eBay listing for 2321 Happy Birthday Building Set $5.28
(BG) Used - 100% complete, no instructions, no box, very good condition $12.80

Duplo figures

Happy Birthday Building Set contains 1 duplo figure. The duplo figure is also included in 1 other set.
2327pb19
Clown
Clown Duplo figure with a white head, red male hair, wearing blue base with button suspenders - 2327pb19
2 sets
Value $1.60

Sets in Duplo / Building Sets

1797 Bonus Bucket

Theme / Subtheme Duplo / Building Sets
Year 1996
Pieces 90
Availability Retired
1797 LEGO Duplo Bonus Bucket
Retail $19.99
Value $31.85
Growth  +59.3%
Annual growth 1.6%

1861 Box of Bricks

Theme / Subtheme Duplo / Building Sets
Year 1996
Pieces 49
Availability Retired
1861 LEGO Duplo Box of Bricks
Retail $8.99
Value $39.45
Growth  +338.8%
Annual growth 5.1%

2339 Basic Box

Theme / Subtheme Duplo / Building Sets
Year 1996
Pieces 49
Availability Retired
2339 LEGO Duplo Basic Box
Retail $9.99
Value $14.58
Growth  +45.9%
Annual growth 1.3%

1753 Medium Bulk Bucket

Theme / Subtheme Duplo / Building Sets
Year 1996
Pieces / Duplo figures 47 / 1
Availability Retired
1753 LEGO Duplo Medium Bulk Bucket
Retail $9.99
Value $82.13
Growth  +722.1%
Annual growth 7.3%

1751 Small Bulk Bucket

Theme / Subtheme Duplo / Building Sets
Year 1996
Pieces / Duplo figures 27 / 1
Availability Retired
1751 LEGO Duplo Small Bulk Bucket
Retail $5.99
Value $92.28
Growth  +1440.6%
Annual growth 9.6%

1784 Animals Bulk Box

Theme / Subtheme Duplo / Building Sets
Year 1996
Pieces 21
Availability Retired
1784 LEGO Duplo Animals Bulk Box
Retail $4.99
Value $23.77
Growth  +376.4%
Annual growth 5.3%

My Collection

Happy Birthday Building Set Reviews

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4.7
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About Duplo Building Sets

LEGO Duplo Building Sets consists of basic brick assortments designed for young children, featuring large, easy-to-handle pieces that encourage creativity and free play. These sets provide a foundation for early building skills with a variety of colorful bricks, doors, windows, and figures, allowing for open-ended construction. Aimed at preschoolers, the theme emphasizes simple stacking, imaginative play, and hands-on learning, making it a staple in the Duplo lineup.

Building Sets consists of 182 sets that ran from 1972 to 2018. As of today, 10555 Creative Bucket is the most valuable Building Sets set with an estimated new/factory sealed value of $353.
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