A family day in Penzance works best when it mixes one or two clear activities with plenty of breathing space. That way the day feels fun instead of like a race between attractions.
A simple plan might combine the town centre, a beach or pool stop and one indoor fallback in case younger visitors need a break. Keeping journeys short matters almost as much as picking the right activities.
The town is at its best for families when there is room to pause, snack and change pace. If the day stays flexible, everyone tends to enjoy it more.