How Long Does LEGO® FLL WORLD Class: Learning Unleashed Challenge Kit (45800) Take to Build?

A typical builder finishes LEGO® FLL WORLD Class: Learning Unleashed Challenge Kit (set 45800, 2,098 pieces) in about 6 hours. Taking it slowly runs closer to 8 hours; building at a fast pace, about 4 hours 25 minutes.

PieceTick estimates build time from piece count, part complexity, the set’s age rating, your experience level, and how you sort pieces. Adjust those on this page for an estimate matched to how you build.