[2] They may also use Lego Education SPIKE Essential set,[3] a programmable robotics kit, as part of their models.

[4] FIRST Lego League Explore started out as a pilot program in 2004 to encourage young children to have interest in science and engineering.

The only requirements to build models out of Lego elements were to have some moving parts and include at least one simple machine based on a given topic of that year.

There is an age limit that team members must not be older than 9 as of January 1 of the year the Challenge is released.

After registering a team, the coach guides students to do research by following the Challenge guideline.

Children will then work on their "Show Me" poster and Lego models to demonstrate their findings according to the instructions in the Challenge.

At the FIRST Lego League Explore event, there will be "Reviewers" (the judges) to ask children some questions about what they have learned.

[46] FIRST holds an annual event called the FIRST Lego League Explore World Festival Expo each year as part of the FIRST Championship, in Houston, Texas.