This is a video of several different LEGO climbing robots constructed by Japanese LEGO builder muniment Bekkan, who likes to "perform physics experiments using LEGO." First up are a couple variations of pole-climbing (but not dancing) LEGO robots, then one that continuously builds and climbs a taller and taller tower using quadruple stacks of DUPLO blocks. That one is particularly clever. Obviously, now you need to construct a giant version and-- "Rebuild Notre Dame." Too soon -- way too soon. What's the matter with you? Now if you'll excuse me, I need to spot-clean my sofa so I can offer Quasimodo a place to crash for a little while like an actual decent human being.
Keep going for the video.
Thanks to Jeffrey S, who agrees even if you build it, he may not come, but he'll at least watch the video on Youtube.