Museums with kids
The right question isn't which museum but which museum at which age: the city has half a dozen where the child rules and the adult learns along the way.
CosmoCaixa and the experiments lift
The science museum is the absolute king: flooded forest, living planet and an experiment hall where adults surrender before the children. Book a whole morning and arrive at opening.
Sea, science and living history
The port aquarium with its shark tunnel, the maritime museum with its galley and sites with costumed visits complete the repertoire. Many rooms run family workshops on weekends: check the calendar.
The golden rule
One museum per morning, park after, nothing more: cultural overdose is paid in tantrums. Strollers enter nearly everywhere and changing-table restrooms sit on ground floors.