Browse
- Sets
- All Sets
- New Sets
- Recently Retired Sets
- Sets Retiring Soon
- Sets Available Soon
- Set Release Rumors
- Minifigs
- All Minifigs
- New Minifigs
- Recently Retired Minifigs
- Minifigs Retiring Soon
Deals
Analysis
- Sets
- Themes
- Subthemes
- Years
- Most Valuable
- Most Expensive
- Most Owned
- BE 100 Index
- Minifigures
- Most Valuable
- Most Owned
My CollectionSign In or Up

Sets
Minifigure Series
Series 18
Birthday Party Girl

LEGO Minifigure Series 18 Birthday Party Girl

Name: LEGO Minifigure Series 18 Birthday Party Girl
Brand: LEGO
SKU: 71021-6
Availability: InStock
Rating: 4.80 (39 reviews)

Images 2Description 1

LEGO 71021 Birthday Party Girl is a collectable minifigure from Series 18 that was available for $3.99 and is currently valued at $7.29. Secondary market prices typically fall between $6.97 and $11.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Birthday Party Girl since July 2018. Very high accuracy

LEGO 71021-6 Birthday Party Girl is a Series 18 collectible minifigure released in 2018, consisting of 9 pieces and 1 minifigure. The character depicts a young girl dressed for a birthday celebration, wearing a lavender outfit with star-print details and a party hat. Accessories include a printed gift box with a removable lid and a printed balloon animal tile. This minifigure was part of the LEGO Minifigures Series 18, produced to mark the 40th anniversary of the LEGO minifigure.

A new and sealed Birthday Party Girl is currently valued at around $7. The average used price is $5 for those in good overall condition. The 1 included minifig account for approximately 66% of the set's total value. New and sealed listings currently range from $7 to $9.

All regions

All regions 8
United States 8

For Sale (New/Sealed)

	(US) * Best US listing for Birthday Party Girl *	BrickEconomy Choice $9.95
	(US) - outer polybag opened and not included; everything that was inside the polybag is in...	$7.00 -4.0%
	(US) No bag, No Extras, No Checklist. Unassembled parts stored in a zip bag	$8.77 +20.3%
	(US) Series 18 Birthday Party Girl Minifigure (71021) New Retired Rare	$9.95 +36.5%
	(US) CMF Series 18 - Birthday Party Girl (col317) Retired Minifigure Complete	$10.00 +37.2%
	(US) Series 18 Birthday Party Girl Minifigure (71021) New Retired Rare CMF	$12.00 +64.6%
	(US) 71021 CMF Series 18 Birthday Party Girl Minifigure col18-6 Complete New	$12.99 +78.2%
	(US) Series 18 Collectible Party Minifigure - Birthday Party Girl (71021)	$19.78 +171.3%

Sales Distribution (Last 90 Days)

This chart shows the distribution of sales for the past three months of new/sealed Birthday Party Girl.

Sale Trends

This chart shows the sales trends (number sold) of new/sealed Birthday Party Girl.

Minifigs

Birthday Party Girl contains 1 minifig. The minifig is also included in 1 other set.

Sets in Minifigure Series / Series 18


	Birthday Party Boy Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 9 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $3.99 Value $7.27 Growth +82.2% Annual growth 8.1% I own this set I want this set

	Party Clown Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 8 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $3.99 Value $10.97 Growth +174.9% Annual growth 9.0% I own this set I want this set

	Unicorn Guy Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 8 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $3.99 Value $10.01 Growth +150.9% Annual growth 11.7% I own this set I want this set

	Elephant Girl Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 6 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $3.99 Value $12.00 Growth +200.8% Annual growth 10.9% I own this set I want this set

	Dragon Suit Guy Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 6 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $3.99 Value $15.35 Growth +284.7% Annual growth 13.7% I own this set I want this set

	Classic Police Officer Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 6 / 1 Availability Retired Buy this set at Amazon ebay Bricklink	Retail $3.99 Value $22.51 Growth +464.2% Annual growth 12.8% I own this set I want this set

	Spider Suit Boy Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 6 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $3.99 Value $4.56 Growth +14.3% Annual growth 1.9% I own this set I want this set

	Birthday Cake Guy Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 6 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $3.99 Value $5.94 Growth +48.9% Annual growth 6.4% I own this set I want this set

	Cat Costume Girl Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 6 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $3.99 Value $6.33 Growth +58.6% Annual growth 4.2% I own this set I want this set

	Race Car Guy Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 6 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $3.99 Value $8.14 Growth +104.0% Annual growth 9.4% I own this set I want this set

	Brick Suit Guy Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 5 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $3.99 Value $6.20 Growth +55.4% Annual growth 3.4% I own this set I want this set

	Brick Suit Girl Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 5 / 1 Availability Retired Buy this set at Amazon eBay	Retail $3.99 Value $4.68 Growth +17.3% Annual growth 2.0% I own this set I want this set

	Flower Pot Girl Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 5 / 1 Availability Retired Buy this set at Amazon ebay Bricklink	Retail $3.99 Value $6.65 Growth +66.7% Annual growth 4.3% I own this set I want this set

	Cowboy Costume Guy Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 5 / 1 Availability Retired Buy this set at Amazon eBay	Retail $3.99 Value $5.19 Growth +30.1% Annual growth 2.8% I own this set I want this set

	Firework Guy Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 4 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $3.99 Value $4.88 Growth +22.3% Annual growth 2.5% I own this set I want this set

	Cactus Girl Theme / Subtheme Minifigure Series / Series 18 Year 2018 Pieces / Minifigs 4 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $3.99 Value $9.49 Growth +137.8% Annual growth 10.3% I own this set I want this set

	Series 18 Random Bag Theme / Subtheme Minifigure Series / Series 18 Year 2018 Minifigs 1 Availability Retired Buy this set at Amazon eBay	Retail $3.99 Value $11.16 Growth +179.7% Annual growth 18.2% I own this set I want this set

	Series 18 Complete Set Theme / Subtheme Minifigure Series / Series 18 Year 2018 Minifigs 16 Availability Retired Buy this set at eBay Bricklink	Retail $64.00 Value $170.68 Growth +166.7% Annual growth 7.9% I own this set I want this set

	Series 18 Sealed Box Theme / Subtheme Minifigure Series / Series 18 Year 2018 Minifigs 60 Availability Retired Buy this set at Amazon ebay Bricklink	Retail $239.40 Value $368.00 Growth +53.7% Annual growth 5.3% I own this set I want this set

My Collection

I own this set

I want this set

Set Details

Set number

71021-6

Name

Birthday Party Girl

Theme

Minifigure Series

Subtheme

Series 18

Year

2018

Released

April 2018

Retired

July 2018

Availability

Retired

Packaging

Foil Pack

Pieces

9 (PPP $0.44)

Minifigs

1 (Value $4.82)

Set Pricing

Retail price

$3.99

New/Sealed

Value

$7.29

Growth

+82.71%

Annual growth

+5.72%

Rolling growth

+4.08% (Previous 12 months)

90-day change

-2.78%

Used

Value

$5.13

Range

$4.90 - $6.15

Quick Buy

eBay

Buy

Lowest price

$9.95

Highest price

$12.99

Amazon

Buy

Average price

$19.78

Bricklink

Buy

Lowest price

$5.54 (ES)

Highest price

$9.46

*Listings are for new/sealed sets.

Set Predictions

New/Sealed

Today's value

$7.29

1 year forecast

$7.71+5.72%

5 year forecast

$9.35+28.32%

$9.08

$9.61

Birthday Party Girl is projected to be valued between $9.08 - $9.61 within five years.

Insights

A Series 18 40th-anniversary Collectable Minifigures release, Birthday Party Girl is supported by completion demand and exclusive printed elements, and while collectors value her for anniversary sets the lack of unique molds and broad availability limit upside for speculative investors.

Set Facts

The Birthday Party Girl minifigure comes with a balloon and gift package accessory.

Regional Retail Prices (LEGO.com/Store)

United States

$3.99

United Kingdom

£2.99

Canada

$3.99

Europe

€3.99

Australia

$4.99

Birthday Party Girl Reviews

39 reviews

4.8

Collectors

Investors

Jays Brick Blog

“The Birthday Party Girl has most of the same accessories and a matching design with the Birthday Party Boy. In a similarly festive outfit, she comes with a purple balloon, and a lavender party hat as well as a gift box. Overall, the Birthday Party Girl doesn’t come close to... More the Birthday Boy when it comes to being unique.”

Full review at jaysbrickblog.com

The Brick Fan

“The Birthday Party Girl is a young child celebrating her big event. The torso has printing of a white blouse with a lavender colored bow that goes around the torso. The legs are the short variety with her wearing blue shorts and white shoes. Her hair mold includes a pigtail... More along with a purple party hat.”

Full review at www.thebrickfan.com

Subtheme Analysis

Minifigure Series / Series 18

Sets

Year

2018

Annual growth

+4.73% (this set +5.72%)

This set's annual growth (CAGR) vs. subtheme

Community Stats

Birthday Party Girl currently ranks #16 out of the top most owned sets in Minifigure Series Series 18.

#16Birthday Party Girl

#17Cat Costume Girl

#18Birthday Party Boy

About Minifigure Series Series 18

Minifigures Series 18 (71021), also known as the Party series, is a collectable minifigures series released in April 2018 and unlike most series contained seventeen minifigures.

Series 18 was introduced in 2018 and currently consists of 20 sets. As of today, Series 18 Sealed Box is the most valuable Series 18 set with an estimated new/factory sealed value of $368.

Summary

Minifigure Series Series 18 Birthday Party Girl set 71021 was released in April 2018, retailing for $4, but has since been retired. New, unopened Birthday Party Girl sets are valued at $7, while used sets can be found for $5.

“Happy birthday, everybody!”

The Birthday Party Girl wasn’t around in 1978 when the first modern LEGO® Minifigure was made. In fact, she wasn’t around at all until 2018. She’s brand-new!

But even though she doesn’t yet know the long and amazing history of minifigures, from the earliest play themes to the newest special parts and characters, she can’t help but get caught up in the excitement of celebrating 40 years of minifigure fun. After all, this isn’t just the most amazing and thrilling party she’s ever been to – it’s also her very first one!

Set Pricing Models

BrickEconomy uses a number of methods to determine the value of a set.

New/Sealed

Machine Learning/AI Model

Value (today)

$7.29

Value (in a year)

$7.71

Value (in 2 years)

$8.12

Accuracy

0.962500 Very high

Statistical Model

Value (today)

$8.41

Value (in a year)

$8.83

Value (in two years)

$9.25

Accuracy

0.211398 Very low

Used

Machine Learning/AI Model

Value (today)

$5.13

Value (low range)

$4.90

Value (high range)

$6.15

Accuracy

0.907500 High

To learn more about how we calculate pricing and forecasting, check out our article on BrickEconomy’s Approach to LEGO Pricing and Future Value Predictions.

Region · United States (USD)

Theme · Light

Explore

Sets Minifigs Deals

About Us

About BrickEconomy Contact Us Support Us

Helpful Links

FAQs Widgets Sitemap

Follow BrickEconomy

Facebook

Twitter/X

Instagram

LEGO, the LEGO logo, the Minifigure and the brick and knob configurations are trademarks and/or copyrights of the LEGO Group of companies which does not sponsor, authorize or endorse this site.
BrickEconomy, the BrickEconomy logo and all content not covered by The LEGO Group's copyright is, unless otherwise stated, ©2026 BrickEconomy.

Change Region

Changes the pricing currency and date formats to a specific region. Adjusts pricing and date formats to region.