Control Your City!
Build & Program with Mindstorms

Design intelligent traffic systems and explore city management with this classic 2000 set. A nostalgic challenge for LEGO and robotics enthusiasts.

🏛 Mindstorms
Set #9723

Cities and Transportation

Discover the Cities and Transportation from the Mindstorms collection - 394 pieces of building excellence.

⏱ 2-4 hr 🧩 394 pcs

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📦 Full Parts Inventory - 111 unique parts • 373 total pieces

Tyre 30 x 10.5 Offset Tread Tyre 30 x 10.5 Of...
Part #: 2346 Black
Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Plate Round 2 x 2...
Part #: 2654 Black
Technic Brick 1 x 10 [9 Pin Holes] Technic Brick 1 x...
Part #: 2730 Black
Technic Pin with Friction Ridges Lengthwise and Center Slots Technic Pin with ...
Part #: 2780 12× Black
Technic Wedge Belt Wheel Tire Technic Wedge Bel...
Part #: 2815 Black
Sensor, Light with Fixed Cable Sensor, Light wit...
Part #: 2982c01 Blue
Motor Pulley, 9V Micromotor with axle hole Motor Pulley, 9V ...
Part #: 2983 Light Gray
Wheel Rim 24 x 14 VR with Center Axle Hole Wheel Rim 24 x 14...
Part #: 2994 Yellow
Brick 2 x 2 Brick 2 x 2
Part #: 3003 Black
Brick 1 x 2 Brick 1 x 2
Part #: 3004 Black
Plate 2 x 3 Plate 2 x 3
Part #: 3021 Yellow
Plate 2 x 2 Plate 2 x 2
Part #: 3022 Yellow
Plate 1 x 2 Plate 1 x 2
Part #: 3023 16× Yellow
Baseplate 32 x 32 with 8-Stud Straight with Road Print Baseplate 32 x 32...
Part #: 30279pr0001 Green
Plate 4 x 4 Plate 4 x 4
Part #: 3031 Yellow
Plate 4 x 6 Plate 4 x 6
Part #: 3032 Yellow
Plate 6 x 10 Plate 6 x 10
Part #: 3033 Yellow
Brick 1 x 2 without Bottom Tube Brick 1 x 2 witho...
Part #: 3065 Trans-Yellow
Brick 1 x 2 without Bottom Tube Brick 1 x 2 witho...
Part #: 3065 Trans-Red
Brick 1 x 2 without Bottom Tube Brick 1 x 2 witho...
Part #: 3065 Trans-Green
Tile 1 x 2 with Groove Tile 1 x 2 with G...
Part #: 3069b Red
Tile 1 x 2 with Groove Tile 1 x 2 with G...
Part #: 3069b White
Technic Plate 2 x 6 [5 Holes] Technic Plate 2 x...
Part #: 32001 Yellow
Technic Pin 3/4 Technic Pin 3/4
Part #: 32002 Dark Gray
Technic Beam 1 x 11.5 Double Bent Thick Technic Beam 1 x ...
Part #: 32009 Yellow
Technic Axle and Pin Connector Angled #1 Technic Axle and ...
Part #: 32013 Blue
Technic Axle and Pin Connector Angled #5 - 112.5° Technic Axle and ...
Part #: 32015 Light Gray
Technic Beam 1 x 5 Thin Technic Beam 1 x ...
Part #: 32017 Light Gray
Technic Axle and Pin Connector Angled #2 - 180° Technic Axle and ...
Part #: 32034 Light Gray
Technic Axle 2 Notched Technic Axle 2 No...
Part #: 32062 Black
Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Technic Brick 1 x...
Part #: 32064b Green
Technic Axle and Pin Connector Perpendicular 3L with Pin Hole Technic Axle and ...
Part #: 32068 Light Gray
Technic Axle 5 Technic Axle 5
Part #: 32073 Black
Technic Bush 1/2 Smooth with Axle Hole Reduced Technic Bush 1/2 ...
Part #: 32123a Light Gray
Plate 1 x 8 Plate 1 x 8
Part #: 3460 Yellow
Wheel with Split Axle hole Wheel with Split ...
Part #: 3482 Yellow
Tyre Offset Tread 24 x 8 Tyre Offset Tread...
Part #: 3483 Black
Plate 1 x 3 Plate 1 x 3
Part #: 3623 Yellow
Minifig Head Standard Grin Print [Blocked Open Stud] Minifig Head Stan...
Part #: 3626bpr0001 Yellow
Minifig Head, Black Sunglasses and Standard Grin Print [Blocked Open Stud] Minifig Head, Bla...
Part #: 3626bpr0006 Yellow
Minifig Head, Freckle Nose and Standard Grin Print [Blocked Open Stud] Minifig Head, Fre...
Part #: 3626bpr0009 Yellow
Tyre 43 x 17 Tyre 43 x 17
Part #: 3634 Black
Technic Gear 8 Tooth Technic Gear 8 Tooth
Part #: 3647 Light Gray
Technic Gear 24 Tooth [New Style with Single Axle Hole] Technic Gear 24 T...
Part #: 3648b Light Gray
Technic Gear 24 Tooth Crown with Reinforcements [New Style] Technic Gear 24 T...
Part #: 3650c Light Gray
Plate 1 x 6 Plate 1 x 6
Part #: 3666 Yellow
Technic Pin without Friction Ridges Lengthwise Technic Pin witho...
Part #: 3673 12× Light Gray
Technic Brick 1 x 2 [1 Pin Hole] Technic Brick 1 x...
Part #: 3700 16× Black
Technic Brick 1 x 4 [3 Pin Holes] Technic Brick 1 x...
Part #: 3701 Black
Technic Brick 1 x 8 [7 Pin Holes] Technic Brick 1 x...
Part #: 3702 Black
Technic Brick 1 x 16 [15 Pin Holes] Technic Brick 1 x...
Part #: 3703 Black
Technic Axle 4 Technic Axle 4
Part #: 3705 Black
Technic Axle 6 Technic Axle 6
Part #: 3706 Black
Technic Axle 8 Technic Axle 8
Part #: 3707 Black
Technic Axle 12 Technic Axle 12
Part #: 3708 Black
Technic Plate 2 x 4 [3 Holes] Technic Plate 2 x...
Part #: 3709 Yellow
Plate 1 x 4 Plate 1 x 4
Part #: 3710 Yellow
Technic Bush Technic Bush
Part #: 3713 Light Gray
Technic Axle 10 Technic Axle 10
Part #: 3737 Black
Technic Plate 2 x 8 [7 Holes] Technic Plate 2 x...
Part #: 3738 Yellow
Technic Gear Rack 1 x 4 Technic Gear Rack...
Part #: 3743 Light Gray
Technic Axle Pin without Friction Ridges Lengthwise Technic Axle Pin ...
Part #: 3749 Light Gray
Technic Brick 1 x 6 [5 Pin Holes] Technic Brick 1 x...
Part #: 3894 Black
Technic Brick 1 x 12 [11 Pin Holes] Technic Brick 1 x...
Part #: 3895 Black
Hair, Smooth Hair, Smooth
Part #: 3901 Black
Brick Round 2 x 2 with Axle Hole Brick Round 2 x 2...
Part #: 3941 Black
Bracket 2 x 2 - 2 x 2 Bracket 2 x 2 - 2...
Part #: 3956 Black
Technic Gear 16 Tooth with Round Holes [Old Style] Technic Gear 16 T...
Part #: 4019 Light Gray
Rubber Band / Belt Holder 2 x 4 x 2 1/3 Rubber Band / Bel...
Part #: 41752 Dark Gray
Technic Wedge Belt Wheel [aka Pulley] Technic Wedge Bel...
Part #: 4185 Light Gray
Technic Pin 1/2 Technic Pin 1/2
Part #: 4274 Light Gray
Motor, 9V Mini [Lightweight New Style] Motor, 9V Mini [L...
Part #: 43362c01 Black
Plate 1 x 10 Plate 1 x 10
Part #: 4477 Yellow
Hat / Cap Long Peak [Plain] Hat / Cap Long Pe...
Part #: 4485 Blue
Technic Axle 3 Technic Axle 3
Part #: 4519 Black
Hair Center Parting Hair Center Parting
Part #: 4530 Brown
Hair Center Parting Hair Center Parting
Part #: 4530 Black
Technic Worm Gear Technic Worm Gear
Part #: 4716 Black
Wire with Brick 2 x 2 x 2/3 Pair, 20L Wire with Brick 2...
Part #: 5306bc020 Black
Wire with Brick 2 x 2 x 2/3 Pair, 26L Wire with Brick 2...
Part #: 5306bc026 Yellow
Wire with Brick 2 x 2 x 2/3 Pair, 36L Wire with Brick 2...
Part #: 5306bc036 Black
Wire with Brick 2 x 2 x 2/3 Pair, 69L Wire with Brick 2...
Part #: 5306bc069 Black
Wire with Brick 2 x 2 x 2/3 Pair, 378L Wire with Brick 2...
Part #: 5306bc378 Black
Light Brick 1 x 2 with Single Side Light Light Brick 1 x 2...
Part #: 6035 White
Technic Axle and Pin Connector Perpendicular Technic Axle and ...
Part #: 6536 Light Gray
Technic Axle Connector Ridged [with x Hole x Orientation] Technic Axle Conn...
Part #: 6538b Light Gray
Technic Gear Differential, 24 -16 Tooth with Clutch on Both Sides Technic Gear Diff...
Part #: 6573 Dark Gray
Tyre 30.4 x 14 VR Tyre 30.4 x 14 VR
Part #: 6578 Black
Technic Axle 3 with Stud Technic Axle 3 wi...
Part #: 6587 Dark Gray
Technic Gearbox 2 x 4 x 3 1/3 Technic Gearbox 2...
Part #: 6588 Yellow
Technic Gear 12 Tooth Bevel Technic Gear 12 T...
Part #: 6589 Light Gray
Technic Beam 1 x 3 Thin Technic Beam 1 x ...
Part #: 6632 Light Gray
Rubber Band Small 13mm (Square Cross Section) Rubber Band Small...
Part #: 71509 Black
Technic Pin Connector Round [No Slot] Technic Pin Conne...
Part #: 75535 Yellow
Hose Rigid 3mm D. 18L / 14.4cm Hose Rigid 3mm D....
Part #: 75c18 Blue
Hose Rigid 3mm D. 20L / 16cm Hose Rigid 3mm D....
Part #: 75c20 Blue
Technic Gear 24 Tooth Clutch with Dark Gray or Light Gray Center Technic Gear 24 T...
Part #: 76019 White
Technic Rubber Belt Medium [24mm ID] [Round Cross Section] Technic Rubber Be...
Part #: 85544 Red
Sensor, Touch Sensor, Touch
Part #: 879 Light Gray
Hips and Black Legs Hips and Black Legs
Part #: 970c03 Black
Hips and Red Legs Hips and Red Legs
Part #: 970c22 Red
Hips and White Legs Hips and White Legs
Part #: 970c27 White
Hips and Blue Legs Hips and Blue Legs
Part #: 970c28 Blue
Torso, Red Arms, Yellow Hands [Plain] Torso, Red Arms, ...
Part #: 973c22h01 Red
Torso Palm Tree Print, White Arms, Yellow Hands Torso Palm Tree P...
Part #: 973c27h01pr0017 White
Torso Octan Logo Print, White Arms, Yellow Hands Torso Octan Logo ...
Part #: 973c27h01pr0130 White
Torso Jacket with Zipper and 3 Pockets Print, Blue Arms, Yellow Hands Torso Jacket with...
Part #: 973c28h01pr1245 Blue
🧱 Storage / Sorting...
Part #: 4125890 Trans-Clear
🧱 Sticker Sheet for...
Part #: 4230879 [No Color/Any Color]
🧱 Storage Bin Lid, ...
Part #: 71082 Trans-Clear
🧱 Activity Booklet ...
Part #: 9723b1 [No Color/Any Color]
🧱 Activity Booklet ...
Part #: 9723b2 [No Color/Any Color]
🧱 Activity Booklet ...
Part #: 9723b3 [No Color/Any Color]
🧱 Activity Booklet ...
Part #: 9723b4 [No Color/Any Color]
🧱 Storage Bin, Dact...
Part #: upn0032 Black

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Charts Inventory Statistics

111
Unique Parts
373
Total Pieces
0
Minifigures
Inventory Version: 1