![BrickLink - Gear 3805-1 : LEGO Robotics Invention System Upgrade Kit (2.0) [Software:Mindstorms:RCX] - BrickLink Reference Catalog BrickLink - Gear 3805-1 : LEGO Robotics Invention System Upgrade Kit (2.0) [Software:Mindstorms:RCX] - BrickLink Reference Catalog](https://img.bricklink.com/ItemImage/GL/3805-1.png)
BrickLink - Gear 3805-1 : LEGO Robotics Invention System Upgrade Kit (2.0) [Software:Mindstorms:RCX] - BrickLink Reference Catalog
![LEGO 3804 Robotics Invention System, Version 2.0 Set Parts Inventory and Instructions - LEGO Reference Guide LEGO 3804 Robotics Invention System, Version 2.0 Set Parts Inventory and Instructions - LEGO Reference Guide](https://www.toysperiod.com/img/cache/cb/800x600/d4e4o5g414u3y404y284u2n2s5h4c4r2b4w244q2b4v2v2.jpg)
LEGO 3804 Robotics Invention System, Version 2.0 Set Parts Inventory and Instructions - LEGO Reference Guide
![LEGO 3804 Robotics Invention System, Version 2.0 Set Parts Inventory and Instructions - LEGO Reference Guide LEGO 3804 Robotics Invention System, Version 2.0 Set Parts Inventory and Instructions - LEGO Reference Guide](https://www.toysperiod.com/img/cache/a4/0x0/d4e4o5g414f4w5w5n4z5m44426a4k4l4y5v2w5o4g5g4l4y5w2x294x2x2v2w2u264o2e4u584n2s2l2p2.jpg)
LEGO 3804 Robotics Invention System, Version 2.0 Set Parts Inventory and Instructions - LEGO Reference Guide
![LEGO Set 3804-1 Robotics Invention System, Version 2.0 (2001 Mindstorms > RCX) | Rebrickable - Build with LEGO LEGO Set 3804-1 Robotics Invention System, Version 2.0 (2001 Mindstorms > RCX) | Rebrickable - Build with LEGO](https://cdn.rebrickable.com/media/thumbs/sets/3804-1/2938.jpg/1000x800p.jpg)