First, answer the questions on extracurriculars using a line graph. What age started, finished, or still continuing.
Then ask questions on a sport extracurricular activity that was done the longest, then an artistic extracurricular, like music or art etc. And answer the questions on the longest activity or continuing one again. That way you have a sample of different types of activities and the answers for them.

If you opened up the survey, you would see what I mean. Othwerwise, the data seems rather useless. And what use would the end product be, if the data was useless?