The Expanded LEGO Glossary | Rainbow Bricks RLUG LEGO Glossary Deciphering the secret language of the brick for our Rainbow Bricks community! The “Who’s Who” of Fans AFOLAdult Fan of LEGO. The heart of our community! TFOL / KFOLTeen/Kid Fan of LEGO. Our builders of the future. RLUGRecognized LEGO User Group. (Like us, Rainbow Bricks!) … Continue reading LEGO Glossary