The LEGO Technic Deep-Sea Research Submarine (42201) is a 413-piece building set that lets you build a submarine with a minifigure. The set centres on recognisable Technic functions: the propellers at the back rotate, a grabber arm sits at the front, and the transparent cockpit opens so the minifigure can ride along.
Children build the model themselves and then play with it like a real research submarine: spinning the propellers, operating the grabber arm to "pick up" something from the seabed, and opening and closing the cockpit for the crew. It's a building set where the play after building is just as much part of the fun as the construction itself.
The box states 413 parts and an age recommendation of 9 years and up. The set also includes separate accessories, such as a cable reel, that complete the scenario of a real deep-sea expedition.
A great gift for children who love technology, building and the underwater world, and for anyone who enjoys working with LEGO Technic's moving parts.