Roaming a beach they swam to or you went by dinghy.
About 1/4 mi from our marina was a small beach with overhanging trees to the waterline and a small clay deposit. It was a big row for an 8 yr. old, but our daughter called it "The Secret Beach of Fun". She and her friends would sculpt things from the clay, and swim in the shallows. It was a mini-microsm of the Chesapeake Bay. She still recalls it fondly 10 years later.
A point that I forgot earlier.....starting at about 6 yrs, she became bored with passages and just staying on the boat, so we changed our cruising style and searched out marinas with pools.... I can still recite the distance (in hours) between each pool on the Chesapeake.
So we didn't anchor out that much for a number of years, but watching our kid splash endlessly (still!) is a joy. We're just now starting to anchor our again. Sadly, our daughter doesn't join us as much anymore, but maybe she'll return in a few years. At this stage, friends are far more important. Such is the rhythm of life.