Registration for the season opens in May. At that time, you can register in the Team Information Management System (TIMS) and with the FIRST Youth Protection Program. The FIRST Lego League web site contains extensive information about the season as well as team and education resources.
Registration usually closes around mid-September. After you register and pass the YPP, TIMS will provide you with a link to purchase a field kit (required) and an EV3 robot at a slight discount (if you don’t already have one).
Robotics kits may also be purchase from Lego Education.