Early Math Measurement Set (9541-1) is a Duplo and Explore LEGO set released in 2004 with 104 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing Duplo and Explore sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 51 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
2004 (22 years ago — may be retired)
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Catalog scale
104 parts listed · 51 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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Shipping weight (est.)
~484 g for parts inventory (excludes box/minifig packaging)
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Before you buy used
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Market value
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Parts in this set
51 parts · page 1 of 2 · updating…
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Duplo Animal Lion Cub on Base2275c01pr0001 · ×1 · Earth Orange -
Duplo Animal Tiger Cub on Green Base2275c01pr0003 · ×1 · Yellow -
Duplo Baseplate 12 x 166851 · ×1 · White -
Duplo Brick 1 x 2 x 24066 · ×1 · Bright Green -
Duplo Brick 1 x 2 x 24066 · ×1 · Blue -
Duplo Brick 1 x 2 x 24066 · ×1 · Yellow -
Duplo Brick 1 x 2 x 24066 · ×1 · Red -
Duplo Brick 2 x 23437 · ×6 · Bright Green -
Duplo Brick 2 x 23437 · ×5 · Blue -
Duplo Brick 2 x 23437 · ×6 · White -
Duplo Brick 2 x 23437 · ×5 · Red -
Duplo Brick 2 x 2 with Eye with White Spot Print, on Two Sides - Type 13437pr0067 · ×1 · Bright Green -
Duplo Brick 2 x 2 with Eye, Giraffe's Print, on Two Sides3437pr0050 · ×1 · Yellow -
Duplo Brick 2 x 2 x 2 Curved Top3664 · ×1 · Yellow -
Duplo Brick 2 x 2 x 2 Curved Top3664 · ×1 · Red -
Duplo Brick 2 x 3 with Curved Top2302 · ×2 · Bright Green -
Duplo Brick 2 x 3 with Curved Top2302 · ×2 · Blue -
Duplo Brick 2 x 3 with Curved Top2302 · ×2 · Yellow -
Duplo Brick 2 x 3 with Curved Top2302 · ×2 · Red -
Duplo Brick 2 x 3 x 2 with Curve2301 · ×1 · Red -
Duplo Brick 2 x 3 x 2 with Curve2301 · ×1 · Bright Green -
Duplo Brick 2 x 3 x 2 with Curve2301 · ×1 · Blue -
Duplo Brick 2 x 3 x 2 with Curve2301 · ×1 · Yellow -
Duplo Brick 2 x 43011 · ×2 · Bright Green -
Duplo Brick 2 x 43011 · ×2 · Blue -
Duplo Brick 2 x 43011 · ×2 · Yellow -
Duplo Brick 2 x 43011 · ×2 · Red -
Duplo Brick 2 x 4 x 2 Rounded Ends with Large Centered Eyes print4198pr9981 · ×2 · Yellow -
Duplo Brick 2 x 6 x 2 with Curved Ends4197 · ×1 · Blue -
Duplo Brick 2 x 84199 · ×2 · Bright Green -
Duplo Car Base 2 x 6 with Open Hitch End and Red Wheels2312c02 · ×1 · Blue -
Duplo Door / Window4247 · ×1 · Yellow -
Duplo Door / Window Frame with Raised Door Outline2332 · ×1 · Red -
Duplo Fence / Rail 1 x 6 with 5 Rails2214 · ×5 · Red -
Duplo Fence / Rail 1 x 6 with 5 Rails2214 · ×5 · Yellow -
Duplo Figure, Early Child, Hair Swept Left Brown, Red Legs, Open Jacket Print75271pr0010 · ×1 · Bright Green -
Duplo Figure, Early Child, Hair Swept Left Dark Orange, Blue Legs, Blue Overalls with 1 Strap Print75271pr0008 · ×1 · Bright Green -
Duplo Figure, Early Child, with Pigtails Light Yellow, Orange Legs, Orange Overalls Print76045pr0006 · ×1 · Medium Dark Pink -
Duplo Figure, Early Child, with Straight Hair Brown, Red Legs, Red Overalls with 1 Strap Print75176pr0004 · ×1 · White -
Duplo Fire / Grass / Ice 1 x 4 x 231168 · ×1 · Green -
Duplo Plant, Flower with 1 Top Stud6510 · ×5 · Yellow -
Duplo Plant, Flower with 1 Top Stud6510 · ×5 · Red -
Duplo Plant, Flower with 1 Top Stud6510 · ×5 · Orange -
Duplo Plant, Flower with 1 Top Stud6510 · ×5 · Bright Green -
Duplo Plate 2 x 440666 · ×1 · Yellow -
Duplo Plate 2 x 440666 · ×1 · Red -
Duplo Plate 2 x 440666 · ×1 · Bright Green -
Duplo Plate 2 x 440666 · ×1 · Blue