Solenoid Engine Deluxe Kit The Solenoid Engine Deluxe Kit lets your teen build a working electromagnetic engine that clearly demonstrates how electrical energy is converted into mechanical motion. Using nearly 400 LEGO®-compatible pieces, your teen assembles an open-frame engine complete with electromagnets, pistons, a crankshaft, and a flywheel. Because every moving part remains visible, it's easy to watch each stage of the cycle and understand how the components work together. Nothing is tucked away behind plastic covers. Your teen can actually watch the electromagnets pull, release, and repeat as the pistons cycle and the crankshaft turns. Suddenly, electricity isn't just an invisible concept in a science book—it's something he can see happening right in front of him. And just when your teen thinks the build is finished, the experimenting begins. The Deluxe edition includes interchangeable gear sets—including nautilus, oval, square, Geneva, and direction-changing mechanisms—that invite him to swap parts, test different configurations, troubleshoot, and discover how each one changes the engine's motion. It's a hands-on lesson in engineering through experimentation. Instead of becoming another model that sits on a shelf, the finished engine is designed to keep teaching. Every new gear combination reveals another way motion can be transferred, redirected, or transformed, giving your teen a reason to return to the project long after the last piece is in place.