FIRST LEGO League Challenge Robot Sets
From ORTOP Wiki
Since about 2000 LEGO has been offering robotics sets starting with the Mindstorms Robotics Invention System also known as RCX. The Mindstorms NXTfollowed in 2006 and then the Mindstorms EV3 in 2013. In 2019 The SPIKE Prime set was introduced. The Mindstorms EV3 continues to be sold and supported.
SPIKE Prime
Note: Registered FIRST LEGO League Challenge teams can order a bundle that includes both of the sets above by logging into FIRST Inspires, navigating to their Dashboard and selecting "Payments & Products and then "Order Products".
Mindstorms EV3
Note: This is a retired product so it is difficult or impossible to purchase. It does, however, remain legal to use in the FIRST LEGO League Challenge program.