Taking pictures or writing and drawing the results turns a fun activity into a proper experiment.

During the afternoon, the member had a fun activity.

For example, an interesting or fun activity can be described as stimulating, regardless of its physical effects on nerves.

This increases both competitiveness and extra education, as well as being a fun activity too.

This reward could be progress towards an overall task goal or it could simply be the opportunity to pursue a more interesting or fun activity.