Ask participants to draw a time line in the center of a page. On the time line they should write the main elements of the day/activity (e.g. topics, activities, etc., e.g. warm-up game, etc.).
Then ask the participants to draw a line expressing what they think about the day/activity. If they think positively, they should draw a line above the time line and if they think negatively, they should draw a line below. They can also draw a wavy line, with some parts above and some below.
Participants should also be encouraged to give other feedback.