I mean - that's definitely a specialized robot we've not yet built, but I think all the components exist to do it if someone actually bothered to put it togethe

I mean - that's definitely a specialized robot we've not yet built, but I think all the components exist to do it if someone actually bothered to put it together. Scanning a lego instruction booklet to assemble a 3D model of the desired outcome seems extremely reasonable - and assembling legos is clearly within the realm of possibility. Now, we don't have a general AI that you could just hand a pile of legos and a booklet to and we almost certainly won't have one of those for a number of years - but that task isn't out of the realm of reason for a specialized solution.