How can I add multiple fields to a question?

I'm sending out a form and getting parents to register their children for either a Teens or Kids Class....

I want to set up the form to read

Participant details:

NAME     AGE     CLASS (TEEN OR KIDS)

NAME     AGE     CLASS (TEEN OR KIDS)

...

...

As some families have more than one kid/teen....

I want it to look like this one 

You can try the Configurable List widget: https://widgets.jotform.com/widget/configurable_list 

https://www.jotform.com/help/42-How-to-Clone-an-Existing-Form-from-a-URL 

Example: https://form.jotform.co/71227189588873 

Let us know if you need more help.