Build real mechanical systems in a physics-driven sandbox where gears truly work. Freely resize and shape your parts, solve physics-based challenges, fuse structures into stable mechanisms, and engineer everything from precision machines and clockwork creations to powerful steam-driven contraptions.

Bring your machines to life with gears, springs, steam pneumatics, sensors, and circuits. Experiment with motion, force, power, automation, and control to create everything from clever mechanisms to intricate machines and complex mechanical inventions, all built from parts you control.

Build, test, and experiment with limitless mechanical creations in a dynamic, physics-driven environment.

Unleash your creativity as every gear, joint, and machine comes to life through realistic interactions.

Real gears that transmit motion and force without slipping and with high RPM.

Teeth count, size, and bevel angles are fully customizable, allowing precise mechanical systems.

Build powerful steam-powered machines with boilers, pipes, valves, pistons, and mechanical components.

Connect everything together to create working engines, pumps, locomotives, and intricate industrial contraptions.

Build fully functional circuits with a complete set of parts. Connect buttons, levers, motors, lights, sensors, and other parts to create custom control systems, from simple triggers to complex automated machines.

Combine digital logic with analog signals for precise control. Build programmable computers and intelligent mechanisms where circuits and mechanics work as one.

Resize parts freely to fit your design.

Shapes, gears, and components can be stretched and scaled without breaking physics.

Personalize and fine tune every detail of your machines to build truly unique and innovative designs.

No grid. No restrictions.

Place parts anywhere and build machines exactly the way you imagine.

Follow instruction kits to assemble complex machines step-by-step.

Perfect for learning the systems and building intricate creations.

Challenge your creativity and problem solving skills with engaging mechanical puzzles that push your engineering limits.

Fuse parts into a single stable structure with Super Glue.

Unlike traditional physics joints, fused structures stay rigid and stable even in large and complex machines.