[SA steps between AN and KE and moves entire marble track over three feet; KE goes back to their old track; AN goes to RS's track and collects marbles; after a few moments, SA runs off; AM enters area, goes to block table where LL is working; she starts pulling on Lego constructions and disrupting play; LL gets upset and runs off; AM continues to dump Legos on ground; KE approaches AM, then walks away to SA's marble track to get marbles; AN is already collecting some there; AM follows KE and almost bumps into AN]