How do I give users the ability to create new lists in Python?

I am making a little project, a very simple version of sims. This will give users the ability to start families, where each 'child' has their own name, age and gender. I am a beginner, so I do not know how to create a new list whenever a new 'child' is born or adopted. I know how to enter the names of each 'child' into one large list, but I do not know how to give each child an individual list or place in a list where the three individual variables (name, age, gender) are separate from the others individual variables.