One of my favorite things is seeing pieces from LEGO’s younger brands, like DUPLO and Fabuland, incorporated into regular LEGO system builds. The latest build by Joey Klusnick seamlessly blends two DUPLO kayaks into this sleek, shark-shaped submarine. The sideways kayaks perfectly match the curve of the two windscreens used to create the driver’s compartment. And the engine details built into the kayak seats help tie in the medium azure triangular girders, which give the submarine an effective research vessel vibe.

And we have to award bonus points for the complicated lift-arm that keeps the minifigure pilot seated between the regular and inverted windscreens.