Our flat is in a quiet area but if you take a 5-minute-walk, you are in a very nice area with many cafés, restaurants, bars, shops and playgrounds ;-)
Our flat is very family-friendly, since we have a child (3 years old). We like to travel, so we would be happy, if someone would live in our flat (and pay a part of our rent ;-) when we are away. If needed, you can also use a baby bed. My parents live in Berlin and can help you, whenever you need something.