LEGO Mindstorms 1999 Sets - Price and Size
There are 10 LEGO Mindstorms sets in 1999. Robotics Invention System is the largest set with 726 pieces.
| Image | Set Number | Name | Year | MSRP | Price Per Brick |
|---|---|---|---|---|---|
 | 3803 | Robotics Invention System Upgrade Kit | 1999 | $25 | $0.36 |
 | 9709 | RCX Programmable LEGO Brick | 1999 | $110 | $110.00 |
 | 9735 | Robotics Discovery Set | 1999 | $150 | $0.38 |
 | 9738 | RCX Remote Control Unit | 1999 | $19.75 | $19.75 |
 | 9747 | Robotics Invention System | 1999 | $200 | $0.28 |
 | 9748 | Droid Developer Kit | 1999 | $100 | $0.15 |
 | 9755 | Temperature Sensor | 1999 | $24 | $24.00 |
 | 9756 | Rotation Sensor | 1999 | $15 | $15.00 |
 | 9757 | Touch Sensor | 1999 | $11 | $5.50 |
 | 9758 | Light Sensor | 1999 | $19.75 | $19.75 |