1. Confirm your advantages, which are just in line with the position you are applying for.
2. Make it clear that you have made mental preparations and specific methods and measures. For example, you have been taking care of children for three years, and you should have a plan to take care of children and work balance.
On the other hand, this career gap is very valuable to you. You can use this time to think about your career and life, and you can be more responsible for yourself and make more mature decisions.