There’s good advice here from Mirza and João.
As a former manager I don’t see the career gap as a big deal. If you worked at one test job for the six years, you would still need to learn new technologies and techniques to continue to contribute. And this sounds trite, but the reason why we test is because products are new or changing. So we’re always learning. You may be able to anticipate some of what a new employer needs, but there has to be learning on the job.
What you can do for the organization is what’s important. One thing that comes with experience (in both parenting and software development) is decision making. Typically time and resources are limited, so there’s too much to do. You have to decide on priorities. Can multitasking help, or is focus required? When is it better to ask for help or to push on through? A good hiring manager will recognize time management skills. And I would suggest preparing what you want to say about them before an interview.