Working with LEGO isn't the same as working with Minecraft. The collaborative tasks aren't as readily created when students are not in proximate spaces as they are when a group shares a LEGO build. But there are distinct similarities between Minecraft builds and LEGOs. The problem solving, the limitations of the materials in the "game" (people don't realize that while Minecraft players can create modifications to build their own pieces, the process is possible in LEGO too...and even more readily now with 3D printers), and the opportunity for self-expression and collaborative work are all there. But there is something about the physical nature of LEGO, the product itself, and the building itself, that is unique. There is nothing like a large physical object to really impress and deliver a sense of accomplishment.
But I think one of the aspects of true gold that comes out of LEGO work is in the dexterity involved. For young children, they begin with Duplo; larger blocks that are easy to manipulate. But I wondered about my daughter (3 years, 10 months) and her ability to (with some help...albeit as little as I could) to follow the LEGO instructions to locate and place pieces...but also to physically snap them in. With a 97 piece set, she was successful with far more tiny pieces than expected, and stuck with the building process a good three fourths of the way through. Her focus was intense, and she was able to figure out many placements on her own. Though her little fingers had trouble with the tiniest pieces, the other work she accomplished with some but not great difficulty