LEGO NINJAGO Jay’s Electro Mech 71740 – 106-Piece Ninja Building Kit for Kids 4+

Overview

Meet Jay’s Electro Mech (71740), a compact LEGO NINJAGO set designed for quick starts and imaginative battles. With 106 bricks, this 4+ kit fits small hands and invites kids to tell stories inspired by season 4 as they bring a posable mech, a nimble ninja car, a spider-like toy, and a golden-sword display to life.

Inside the box, you’ll find a complete model in each bag, so curious builders can dive into play without delay. A Starter Brick forms a partly constructed base, helping little builders see a result fast and stay engaged from the first click of bricks to the first spin of a propeller blade.

Build and play features

• The mech offers posable arms and legs, a spinning blade, a large sword, and a cockpit that fits Jay for pretend adventures.
• Eyezo r’s car adds action with a spinning platform and a shooter to stage quick-fire battles.
• Two minifigures from season 4—ninja Jay and the villain Eyezor—fuel storytelling and action scenes.
• The display-ready golden sword adds a touch of collectible flair for setup or show moments on a shelf.

Why this set helps little builders

• Quick-start design with a Starter Brick reduces setup time, letting kids begin their adventures faster.
• Instructions PLUS available in the LEGO Building Instructions app provide zoom, ghost, and rotate tools to help navigate steps.
• Simple, engaging build tailored for ages 4 and up, supporting early construction skills and imaginative play.
• Included minifigures spark storytelling, helping kids act out dynamic ninja battles and adventures.

LEGO 4+ sets are crafted for shared moments between kids and adults, offering approachable builds and quick wins that encourage creativity without pressure. While results can vary, many youngsters enjoy the tactile satisfaction of assembling the vehicle, testing the cockpit, and staging friendly mock battles that bring their favorite season 4 scenes to life.