A Cartesian baby would do as well in flatland as in our space. Imagine arranging that all a baby ever sees is a plan of a two-dimensional room and all his actions move around in the room. Maybe the experiment can be modified to be safe and still be informative. The Cartesian baby is brought up in an environment in which motion is discrete. Imagine that the baby' s world is a Macintosh screen.
Objects move without passing through intermediate points.
The baby moves an object by clicking on the initial and final locations. The experiment is to determine how well a baby will do in such a world. This one might be tried with an animal. If a baby is built to expect objects to behave as solids, then it will be surprised when objects appear to interpenetrate. It might pay longer attention to such a scene.