Manipulable Toy

When a plausible idea still has vague consequences, make a tiny version you can change. Move one piece or vary one input and watch what your assumptions imply.

Small model → one changeable input → visible consequence → question the assumptions.

A manipulable toy can be a spreadsheet, movable cards, a simulation, or a physical model. Include only the relationships needed for one useful question, and make one variable easy to change. The toy reveals consequences inside its assumptions; it does not show that those assumptions accurately describe the world.

Try this when…

I believe the idea, but I cannot picture what it would do.

At what point would this plan stop fitting?

Could we move the pieces around before committing?

What changes if this estimate is a little wrong?

What you can use it for

Planning capacity

Explore how a schedule, room, or workload changes as one input varies.

Understanding relationships

Make a rule produce visible consequences that can be compared with an explanation.

Prototyping arrangements

Try an inexpensive model before constructing or committing to the full arrangement.