Oh, ok, sorry.
We observed each child for 30 minutes, and registered what they did each minute on a schema. For each minute, we could only make one registration, so each of the variables has a value between 0-30. Each child/case has a total score of 30.
As an example:
I want to see whether behaviour 1, 2 and/or 3 is related to each other, and whether they are related to the child's age.