Mindstorms Star Wars joined LEGO's robotics to the Star Wars universe with two kits, 9748 Droid Developer Kit in 1999 and 9754 Dark Side Developer Kit in 2000. Builders made droids and machines from the films and programmed how they moved, and the best known build is a version of R2-D2 from the first kit.

Unlike the main Mindstorms line, the kits were not built around the RCX brick but around the Micro Scout, a smaller programmable brick with a motor, a light sensor and a set of built-in programs. The Dark Side kit turned to the Empire, with an AT-AT walker among its models.
2 sets

9754 Dark Side Developer Kit

Theme / Subtheme Mindstorms / Star Wars
Year 2000
Pieces 578
Availability Retired
9754 LEGO Mindstorms Star Wars Dark Side Developer Kit
Retail $99.99
Value $184.21
Growth  +84.2%
Annual growth 2.2%

9748 Droid Developer Kit

Theme / Subtheme Mindstorms / Star Wars
Year 1999
Pieces 657
Availability Retired
9748 LEGO Mindstorms Star Wars Droid Developer Kit
Retail $99.99
Value $172.80
Growth  +72.8%
Annual growth 2.6%