Physics and invention · Ages 5 and up

Sapling Machines: Space Adventure

Build imaginative marble-run machines with ramps, gears, mirrors, lasers, and rockets. Discover gravity, motion, light, and thrust through experiments and chain reactions.

Coming soonPlanned for iPhone, iPad, and Android

Build it, run it, and see what happens

A Sapling Machines marble run using ramps, gears, fans, rockets, and other physics tools — Combine tools into surprising chain reactions.

Autumn forest adventure map with a path of Sapling Machines physics levels — Travel through gentle, hand-built adventures.

Sapling Machines level builder for creating an original marble-run challenge — Create and replay your own levels.

Fundamental physics through play

Gravity moves marbles down ramps. Mirrors guide light. Gears transfer motion. Rockets create thrust. Children discover these relationships by changing a machine and immediately seeing the result.

The real physics engine is tuned to feel playful and forgiving, leaving room to tinker, revise, and try an entirely different idea.

Open-ended Free Play sandbox
Ramps, gears, mirrors, lasers, and rockets
Gentle Adventure levels
Build and play original challenges
No timers or scores to chase

A workshop for curiosity

There is no single correct machine. A run can be useful, ridiculous, elegant, or wonderfully overcomplicated. Each attempt makes cause and effect visible.

No ads. No subscriptions. No accounts. Works offline.

Designed by a physics professor and a math professor

Sapling Machines turns real principles into objects children can manipulate directly, without turning play into a worksheet.

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