James Cameron is technically the only person to descend solo to the Mariana Trench. This sub will not get you there. It will, however, give your kid a respectable shot at imagining the rest. The LEGO Technic Deep-Sea Research Submarine (42201) is built for the ocean-floor-curious, complete with spinning propellers, air tanks, and a grabber arm for hauling up whatever's down there.
The Bliip List (What to expect):
Working steering and 3 spinning propellers
Cockpit with seat and controls for the resident sub captain
Extending arm grabs and lifts the included barrel accessory
3 air tanks and detailed undersea-research styling
Technic-grade engineering at a kid-friendly 9+ entry point
