Catalog: Parts: Brick, Round: 3941: Known Colors: In Educational & Dacta Category
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Brick, Round 2 x 2 with Axle Hole

Part No: 3941 Name: Brick, Round 2 x 2 with Axle Hole
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This Part appears in at least the following items:

[ List | List with Images | Thumbnail Gallery | Summary ]

 Qty 
  Item No  Description   Year 
 Image 
Appears As Regular:
  White:
 18 in 2000446-1 (Inv)Building My SG - Reflect, Celebrate, Inspire2015Yes
 18 in 2000446-2 (Inv)Building My SG - Reflect, Celebrate, Inspire (Special Commemorative Edition)2015Yes
 3 in 9348-1 (Inv)Community Minifigure Set2011Yes
 3 in 9355-1 (Inv)Dacta Space Theme Set1991Yes
 14 in 45570-1 (Inv)EV3 Space Challenge Set2014Yes
 1 in 9594-1 (Inv)Green City Challenge Set2011Yes
 2 in 970675-1 (Inv)House Project Set2002Yes
 12 in 9353-1 (Inv)Large Theme Set1991Yes
 8 in 9691-1 (Inv)LEC LEGO Set (LEGO Education Center)2009Yes
 3 in 9324-1 (Inv)Micro Building Set2007Yes
 2 in 9780-1 (Inv)ROBOLAB Starter Building Set1998Yes
 2 in 9632-1 (Inv)Science & Technology Base Set2006Yes
 2 in 9686-1 (Inv)Simple and Motorized Mechanisms Base Set (Simple & Powered Machines Set)2009Yes
 5 in 5003185-1 (Inv)Simple and Motorized Mechanisms White Elements Pack?Yes
 6 in 9335-1 (Inv)Space & Airport Set2010Yes
 2 in 2000719-1 (Inv)SPIKE Prime Replacement Pack polybag2020Yes
 6 in 45678-1 (Inv)SPIKE Prime Set2020Yes
 5 in 45102-1 (Inv)StoryStarter Space Expansion Set2015Yes
 1 in 9322-1 (Inv)Town Developers Set2007Yes
 4 in 9321-1 (Inv)Transportation Set2006Yes
 17 in 9320-1 (Inv)Voyage into Space (Journey Into Space Set)2003Yes
  Light Bluish Gray:
 18 in 9324-1 (Inv)Micro Building Set2007Yes
 1 in 9322-1 (Inv)Town Developers Set2007Yes
 1 in 2000447-1 (Inv)WeDo Mascot (Mini Milo) polybag2016Yes
  Light Gray:
 24 in 9452-1 (Inv)Giant Lego Topic Set1991Yes
 8 in 9453-1 (Inv)Universal Set (Large Topic Set)1997Yes
  Dark Bluish Gray:
 1 in 9349-1 (Inv)Fairytale & Historic Minifigure Set2011Yes
 3 in 9322-1 (Inv)Town Developers Set2007Yes
  Black:
 2 in 9633-1 (Inv)Advanced Air Power Set (Pneumatics II)1998Yes
 4 in 1053-1 (Inv)Community Buildings (LEGO Basic School Set)1984Yes
 1 in 45022-1 (Inv)Community Minifigure Set2016Yes
 2 in 9594-1 (Inv)Green City Challenge Set2011Yes
 4 in 9337-1 (Inv)Harbor Set2011Yes
 1 in 9707-1 (Inv)Intelligent House Building Set (Control Lab)1996Yes
 8 in 9723-2 (Inv)Mindstorms Cities and Transportation Set (2002 Version)2002Yes
 4 in 9648-1 (Inv)Mindstorms Education Resource Set2006Yes
 4 in 9695-1 (Inv)Mindstorms Education Resource Set2010Yes
 4 in 9857-1 (Inv)Red and Black Plates1992Yes
 1 in 9314-1 (Inv)Rescue Service Set2010Yes
 2 in K1062-1 (Inv)Road Safety Kit1981Yes
 9 in 979760-1 (Inv)RoboChallenge: Exploration Mars Teacher Pack2003Yes
 8 in 9723-1 (Inv)ROBOLAB Cities and Transportation Set2000Yes
 1 in 9795-1 (Inv)ROBOLAB Intelligent House Building Set2001Yes
 8 in 9780-1 (Inv)ROBOLAB Starter Building Set1998Yes
 8 in 9790-1 (Inv)ROBOLAB Team Challenge Set (Serial)1999Yes
 8 in 9793-1 (Inv)ROBOLAB Team Challenge Set (Serial) {2.5}2002Yes
 8 in 9791-1 (Inv)ROBOLAB Team Challenge Set (USB)1999Yes
 8 in 9794-1 (Inv)ROBOLAB Team Challenge Set (USB) {2.5}2002Yes
 8 in 9794-3 (Inv)ROBOLAB Team Challenge Set USB (2004 Version)2004Yes
 8 in 9794-2 (Inv)ROBOLAB Team Challenge Set USB (2005 Version)2005Yes
 8 in 970671-1 (Inv)Special Elements for Cities and Transportation Set2002Yes
 1 in 9959-1 (Inv)Special Elements for Intelligent House Building Set (Special Elements For 979707)1998Yes
 1 in 9955-1 (Inv)Special Elements for Pneumatics II (Special Elements For 979633)1998Yes
 6 in 970670-1 (Inv)Special Elements for Team Challenge Set2002Yes
 4 in 9700-1 (Inv)Technic Control Center (Technic Control 0 Set)1987Yes
 4 in 1092-1 (Inv)Technic Control II1986Yes
 3 in 9322-1 (Inv)Town Developers Set2007Yes
 7 in 9320-1 (Inv)Voyage into Space (Journey Into Space Set)2003Yes
  Red:
 5 in 9610-1 (Inv)Gears Mini Set1993Yes
 2 in 9594-1 (Inv)Green City Challenge Set2011Yes
 2 in 9337-1 (Inv)Harbor Set2011Yes
 28 in 45120-1 (Inv)LearnToLearn Core Set and Curriculum Pack2014Yes
 8 in 9691-1 (Inv)LEC LEGO Set (LEGO Education Center)2009Yes
 1 in 9324-1 (Inv)Micro Building Set2007Yes
 2 in 9630-1 (Inv)Nonmotorized Simple Machines Set (1997 Version)1997Yes
 2 in 9630-2 (Inv)Nonmotorized Simple Machines Set (2002 Version)2002Yes
 4 in 9614-1 (Inv)Pulleys Mini Set1993Yes
 2 in 9725-1 (Inv)ROBOLAB Amusement Park Set {1998 Version}1998Yes
 2 in 9725-2 (Inv)ROBOLAB Amusement Park Set {2002 Version}2002Yes
 1 in 9914-1 (Inv)Set Specific Elements for Amusement Park Set?Yes
 1 in 9957-1 (Inv)Special Elements for 979607 (Technology Activity Set)?Yes
 2 in 970672-1 (Inv)Special Elements for Amusement Park Set2002Yes
 2 in 970089-1 (Inv)Special Elements for Amusement Park Set?Yes
 1 in 9954-1 (Inv)Special Elements for Mini Sets1998Yes
 1 in 9956-1 (Inv)Special Elements for Non-Motorized Simple Machines (Special Elements For 979630)?Yes
 2 in 970669-1 (Inv)Special Elements for Simple Machines Set2002Yes
 2 in 9618-1 (Inv)Structures Set1997Yes
 2 in 9618-2 (Inv)Structures Set (2002 Version)2002Yes
 2 in 9607-1 (Inv)Technology Activity Set (Manufacturing Systems Set)1994Yes
 4 in 9609-1 (Inv)Technology Resource Set1994Yes
 2 in 9322-1 (Inv)Town Developers Set2007Yes
 4 in 9321-1 (Inv)Transportation Set2006Yes
 9 in 9320-1 (Inv)Voyage into Space (Journey Into Space Set)2003Yes
  Tan:
 52 in 9311-1 (Inv)City Buildings Set2010Yes
  Orange:
 28 in 45120-1 (Inv)LearnToLearn Core Set and Curriculum Pack2014Yes
 1 in 9335-1 (Inv)Space & Airport Set2010Yes
 5 in 45102-1 (Inv)StoryStarter Space Expansion Set2015Yes
 1 in 9322-1 (Inv)Town Developers Set2007Yes
  Yellow:
 4 in 9288-1 (Inv)Basic Airport1999Yes
 2 in 9289-1 (Inv)Basic Harbor1999Yes
 1 in 9594-1 (Inv)Green City Challenge Set2011Yes
 28 in 45120-1 (Inv)LearnToLearn Core Set and Curriculum Pack2014Yes
 2 in 9665-1 (Inv)Mechanical Engineering Set2001Yes
 6 in 9324-1 (Inv)Micro Building Set2007Yes
 4 in 9689-1 (Inv)Simple Machines2012Yes
 5 in 5003179-1 (Inv)Simple Machines Yellow Assortment Pack2012Yes
 4 in 45681-1 (Inv)SPIKE Prime Expansion Set2021Yes
 4 in 45680-1 (Inv)SPIKE Prime Expansion Set2020Yes
 17 in 9322-1 (Inv)Town Developers Set2007Yes
 1 in 2000418-1 (Inv)Workshop Kit for Simple Machines2012Yes
  Lime:
 5 in 5003178-1 (Inv)WeDo Misc Pack2012Yes
 4 in 9580-1 (Inv)WeDo Robotics Construction Set2009Yes
  Green:
 28 in 45120-1 (Inv)LearnToLearn Core Set and Curriculum Pack2014Yes
 1 in 2000722-1 (Inv)SPIKE Essential Replacement Pack 1 polybag2021Yes
 5 in 45345-1 (Inv)SPIKE Essential Set2021Yes
  Blue:
 4 in 9389-1 (Inv)Community Starter Set2012Yes
 2 in 9355-1 (Inv)Dacta Space Theme Set1991Yes
 2 in 9337-1 (Inv)Harbor Set2011Yes
 28 in 45120-1 (Inv)LearnToLearn Core Set and Curriculum Pack2014Yes
 2 in 9321-1 (Inv)Transportation Set2006Yes
 3 in 9320-1 (Inv)Voyage into Space (Journey Into Space Set)2003Yes
  Dark Azure:
 4 in 45401-1 (Inv)BricQ Motion Essential2021Yes
 4 in 2000471-1 (Inv)BricQ Motion Essential - Personal Learning Kit2021Yes
  Dark Purple:
 3 in 45400-1 (Inv)BricQ Motion Prime2021Yes
 28 in 45120-1 (Inv)LearnToLearn Core Set and Curriculum Pack2014Yes
  Trans-Neon Orange:
 3 in 9305-1 (Inv)Rescue Transportation Set2003Yes
  Trans-Yellow:
 2 in 9331-1 (Inv)BuildToExpress Set2009Yes
 2 in 45110-1 (Inv)BuildToExpress Set2012Yes
 4 in 9389-1 (Inv)Community Starter Set2012Yes
 2 in 2000414-2 (Inv)Serious Play Starter Kit (214 Pieces Version)2010Yes
 2 in 2000414-3 (Inv)Serious Play Starter Kit (219 Pieces Version)2014Yes
 2 in 2000414-4 (Inv)Serious Play Starter Kit (234 Pieces Version)2021Yes
 2 in 2000410-1 (Inv)Serious Play Window 22007Yes
 1 in 2000409-2 (Inv)Serious Play Window Exploration Bag2010Yes
 1 in 4000004-1 (Inv)Systematic Creativity Toolbox2012Yes
 1 in 9322-1 (Inv)Town Developers Set2007Yes
  Trans-Neon Green:
 2 in 9302-1 (Inv)Creator Community Builders2004Yes
 1 in 9303-1 (Inv)Creator Community Builders (Creator Airport)2001Yes
 2 in 45560-1 (Inv)EV3 Expansion Set2013Yes
 12 in 9594-1 (Inv)Green City Challenge Set2011Yes
 8 in 2000703-1 (Inv)Mindstorms Education (LME) Replacement Pack 42015Yes
 20 in 9650-1 (Inv)Scenery Resource Set2002Yes
  Trans-Dark Blue:
 4 in 9320-1 (Inv)Voyage into Space (Journey Into Space Set)2003Yes
  Trans-Light Blue:
 2 in 45560-1 (Inv)EV3 Expansion Set2013Yes
 20 in 2000430-1 (Inv)Serious Play Identity and Landscape Kit {2013 Version}2013Yes
 20 in 2000430-2 (Inv)Serious Play Identity and Landscape Kit {2022 Version}2022Yes
 1 in 2000722-1 (Inv)SPIKE Essential Replacement Pack 1 polybag2021Yes
 5 in 45345-1 (Inv)SPIKE Essential Set2021Yes
 2 in 45681-1 (Inv)SPIKE Prime Expansion Set2021Yes
 2 in 45680-1 (Inv)SPIKE Prime Expansion Set2020Yes
 2 in 2000480-1 (Inv)SPIKE Prime Personal Learning Kit2022Yes
 4 in 45300-1 (Inv)WeDo 2.0 Core Set2016Yes
 2 in 2000715-1 (Inv)WeDo 2.0 Replacement Pack polybag2016Yes
  Chrome Silver:
 14 in 9320-1 (Inv)Voyage into Space (Journey Into Space Set)2003Yes
Appears As Counterpart:
  Black:
 2 in 1053-1 (Inv)Community Buildings (LEGO Basic School Set)1984Yes

Summary:

 Color  In   Total Qty 
Appears As Regular:
 White 21  134 
 Light Bluish Gray 3  20 
 Light Gray 2  32 
 Dark Bluish Gray 2  4 
 Black 30  145 
 Red 25  93 
 Tan 1  52 
 Orange 4  35 
 Yellow 12  78 
 Lime 2  9 
 Green 3  34 
 Blue 6  41 
 Dark Azure 2  8 
 Dark Purple 2  31 
 Trans-Neon Orange 1  3 
 Trans-Yellow 10  19 
 Trans-Neon Green 6  45 
 Trans-Dark Blue 1  4 
 Trans-Light Blue 10  60 
 Chrome Silver 1  14 
Appears As Counterpart:
 Black 1  2 

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