See what makes
the world move.

Understand machines in 3D.
Free to explore. Open to build on.

JET ENGINE

How does moving air move an airplane?

Look inside

THE OPEN COLLECTION / 6 FEATURED MECHANISMS

Find something
worth figuring out.

How does a push become rotation?

How does air move an airplane?

How does a spring keep time?

How does a needle leave a stitch?

Why does stronger mean slower?

Why can wheels turn differently?