Fonctionnement - A walking animal

Place the animal on a table with a surface not too smooth (e.g. unvarnished wood, sheets of paper).

Stretch the line and let the paper clip hang from the edge of table. Push the animal slightly aside. That's it, he's moving forward!

If it does not work, weigh down the paper clip with small pieces of cardboard and check that the feet are vertical.

It is the action of the force of gravity on the paper clip that pulls the wire and drags the animal forward.

When arrived at the end of the table, the animal stops because the wire pulls downwards.