yes and no.

monomateriality

Project by Vimal Patel creates a handheld 3D printer using only a glue gun and a filament dispenser made with LEGO:

For a university project, we were provided with biodegradable 3D printing filament and asked to make stuff with it. The intention is to explore ways of making products solely with this filament (monomateriality), so that both making and recycling things can be simple.

Our university workspace has multiple UP 3D printers, so it made sense to begin there … experiments showed that variable stiffness was possible, even on inexpensive 3D printers. Nevertheless, it was clear that the layer-by-layer deposition of material constrained the plane of flexibility to a single axis which made it difficult to make complex shapes (like a helmet). The ideal situation would be to extrude material along a path in multiple axes (i.e., with a robotic arm). This is a damned difficult thing to model and program, so I sought a simpler way. What I did was build an extruder using Lego, and attached it to a hot glue gun …

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VW SP 2, 1971-76. Made by Karmann Ghia do Brasil. Via volkswagen classic

Ray Arizona 4, 1989 from The Mining Project