On Sat, 8 Dec 2012 Henry Baker <hbaker1@pipeline.com> suggested:

It would probably make sense to first build a number of identical robots that could put Lego pieces together and then climb up on the growing tower.

More realistic (or at least more fun) might be an army of volunteer 6-to-10-year-olds building modules and a pile of Autonomous quadcopters for assembly. -- Tom Duff. Purple lines run though some of the scenes during the lake floor putt-putt ride.