Basic Building Set (725-1) is a Basic LEGO set released in 1990 with 440 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing Basic sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 2 minifigures and 135 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
1990 (36 years ago — may be retired)
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Catalog scale
440 parts listed · 135 inventory lines tracked
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Minifigures
2 in this set's inventory — verify completeness when buying used
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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.)
~938 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
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Minifigures in Basic Building Set
Parts in this set
135 parts · page 1 of 3 · updating…
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![Animal / Creature Accessory, Horse Hitching, 1 x 2 Plate and 2 x 2 Plate [Studded]](https://cdn.rebrickable.com/media/parts/elements/239723.jpg)
Animal / Creature Accessory, Horse Hitching, 1 x 2 Plate and 2 x 2 Plate [Studded]2397 · ×1 · Blue -
![Animal / Creature Accessory, Saddle [One Clip]](https://cdn.rebrickable.com/media/parts/ldraw/4/4491a.png)
Animal / Creature Accessory, Saddle [One Clip]4491a · ×1 · Red -
Animal, Bird, Parrot with Coloured Feathers Print2546pr0001 · ×1 · Red -
Animal, Horse, Movable Head, Black Eyes Circled with White, Brown Bridle Print4493c01pr0002 · ×1 · Black -
Antenna 1 x 4 with Rounded Top3957a · ×2 · Red -
Bar 1 x 4 x 2 with Studs4083 · ×1 · White -
Bar, 4 Top Bars, Palm Tree Top2566 · ×1 · Brown -
Baseplate 16 x 163867 · ×2 · Light Gray -
Brick 1 x 13005 · ×2 · Red -
Brick 1 x 13005 · ×24 · White -
Brick 1 x 13005 · ×2 · Blue -
Brick 1 x 1 x 5 with Blocked Open or Hollow Stud2453a · ×2 · White -
Brick 1 x 23004 · ×22 · White -
Brick 1 x 23004 · ×2 · Red -
Brick 1 x 23004 · ×2 · Trans-Clear -
Brick 1 x 23004 · ×2 · Black -
Brick 1 x 23004 · ×2 · Light Gray -
Brick 1 x 23004 · ×2 · Blue -
Brick 1 x 2 x 5 with Blocked Open Studs and Bottom Stud Holder with Asymmetric Ridges2454a · ×2 · White -
Brick 1 x 33622 · ×18 · White -
Brick 1 x 43010 · ×16 · White -
Brick 1 x 63009 · ×10 · White -
Brick 1 x 83008 · ×4 · White -
Brick 2 x 23003 · ×6 · White -
Brick 2 x 23003 · ×2 · Blue -
Brick 2 x 23003 · ×1 · Red -
Brick 2 x 2 Corner2357 · ×6 · White -
Brick 2 x 33002 · ×2 · White -
Brick 2 x 43001 · ×1 · Blue -
Brick 2 x 43001 · ×2 · White -
Brick Arch 1 x 6 x 2 - Thick Top with Reinforced Underside3307 · ×2 · White -
Brick Round 1 x 1 Open Stud3062b · ×2 · Red -
Brick Round 1 x 1 Open Stud3062b · ×4 · Blue -
Brick Round 1 x 1 Open Stud3062b · ×2 · Trans-Yellow -
Brick Round 1 x 1 Open Stud3062b · ×1 · Green -
Brick Round 2 x 2 with Axle Hole3941 · ×2 · Red -
Brick Sloped 33° 3 x 23298 · ×4 · Red -
Brick Sloped 33° 3 x 43297 · ×4 · Red -
Brick Sloped 45° 2 x 1 Triple with Ovoid Bottom Pin3048c · ×2 · Red -
Brick Sloped 45° 2 x 1 with Bottom Pin3040b · ×6 · Red -
Brick Sloped 45° 2 x 1 with Bottom Pin3040b · ×2 · White -
Brick Sloped 45° 2 x 1 with Bottom pin, with White Rotary Dial Print3040bpr0004 · ×1 · Black -
Brick Sloped 45° 2 x 23039 · ×4 · White -
Brick Sloped 45° 2 x 23039 · ×8 · Red -
Brick Sloped 45° 2 x 2 Double3043 · ×2 · Red -
Brick Sloped 45° 2 x 2 Double Convex3045 · ×8 · Red -
Brick Sloped 45° 2 x 3 Double3042 · ×2 · Red -
Brick Sloped 45° 2 x 43037 · ×8 · Red