Setobrick

LEGO Duplo 10909 Heart Box

202080 piecesno minifigures

LEGO 10909 Heart Box

Specifications

Set number10909
Release year2020
Piece count80
Minifigures0
ThemeDuplo
SubthemeBasic Set
Building instructionsDownload the instructions on lego.com

Where to buy set 10909

Also on: Amazon.co.uk · Amazon.ca

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LEGO set 10909 Heart Box, released in 2020 as part of the Duplo line, has 80 pieces. Its inventory breaks down into 39 different lots, across 12 colors.

Heart Box belongs to the open-ended side of Duplo, where large elements are used for simple handling and flexible building rather than for a fixed licensed scene.

The set can also be combined naturally with other Duplo elements because it is not tied to one specific model.

Heart Box is mainly suited to hands-on play and basic building rather than display. For a collection, it functions as a supplementary Duplo box, useful for expanding available parts without adding a defined story setting. Compared with more narrative Duplo sets, it remains deliberately broad and adaptable.

Inventory of set 10909

The inventory of set 10909 lists 80 pieces, spare parts excluded: 39 different lots (one shape in one color) for 20 part shapes.

Colors of set 10909

Main color: white, making up 18% of the parts, followed by medium azure (16%) and yellow (15%).

ColorPartsShare
White1418%
Medium Azure1316%
Yellow1215%
Red911%
Lime911%
Coral67.5%
Bright Light Yellow56.2%
Light Aqua56.2%
Orange22.5%
Yellowish Green22.5%
Other colors (2)33.8%

Most common parts in set 10909

PartColorQuantity
Duplo Brick 2 x 2 3437White8
Duplo Brick 2 x 2 3437Red7
Duplo Brick 2 x 2 3437Yellow7
Duplo Brick 2 x 2 3437Lime6
Duplo Brick 2 x 2 3437Coral4
Duplo Brick 2 x 2 3437Bright Light Yellow4
Duplo Brick 2 x 2 3437Medium Azure3
Duplo Plate 2 x 4 40666Medium Azure3
Duplo Brick 2 x 2 3437Light Aqua2
Duplo Brick 2 x 2 3437Orange2

13 of the 20 part shapes in this set have their own page on Setopedia, with their colors, element numbers and the other sets that use them. See all LEGO parts

No part in set 10909 is exclusive: each one is found in at least one other set, which makes replacing a lost element easier.

Rebuilding set 10909 from another set

Share of the parts of set 10909 found in each of these similarly sized sets, counting shape, colour and quantity:

SetFoundPartsRelease year
10958 Creative Birthday Party56%2002021
10934 Creative Animals50%1752020
10978 Creative Building Time48%1202022
10913 Brick Box45%652020
45021 Our Town45%2802017

No similarly sized set goes above 56%: the model relies on a little-shared assortment, most of which has to be gathered piece by piece.

Size of set 10909 within its line

With 80 pieces, set 10909 ranks #150 out of 522 Duplo sets in our database, which have an average of 69 parts. Among the 490 sets released in 2020, it ranks #348.

Frequently asked questions

How many pieces does LEGO set 10909 Heart Box have?

LEGO set 10909 Heart Box has 80 pieces. It was released in 2020 as part of the Duplo theme.

What year was LEGO set 10909 released?

Set 10909 Heart Box was released in 2020 and belongs to the Duplo theme.

Which minifigures are included in set 10909?

LEGO set 10909 Heart Box does not include any minifigures.

Where can I find the building instructions for set 10909?

The instructions for LEGO set 10909 Heart Box can be downloaded free as a PDF from the official lego.com website, under “Building Instructions”, by entering the number 10909.

What is the main color of LEGO set 10909?

White, with 14 out of 80 pieces, or 18%. Next come medium azure (16%) and yellow (15%).

How many different parts does set 10909 contain?

Set 10909 has 39 different lots (one shape in one color), covering 20 part shapes. Most common part: Duplo Brick 2 x 2 in white, with 8 copies.

Does LEGO set 10909 contain any exclusive parts?

No: every one of its parts is found in at least one other set.

Which similarly sized set contains the most parts from set 10909?

Set 10958 Creative Birthday Party, released in 2021: it supplies 56%, counting shapes, colors and quantities.

Set number10909
Release year2020
ThemeDuplo
Piece count80
Minifigures0
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-30