FREE LEGO Lexo Knights Monster Building Event This post may contain affiliate links. Please see the full disclosure policy here. Posted on November 5, 2016 Written by Mary Leave a Comment Be sure to visit your local Toys R Us on November 12th for their free LEGO Lexo Knights Building Event! Your kiddos can make and take home a free LEGO Lexo Knights Monster on 11/12/16 from 12-2pm. Available while supplies lasts.