Stockholm with children
Buses give free rides to a stroller with a child, and one accompanying adult.
Most museums are free of charge for children.
Toilets might be hard to find in Stockholm. Most hotels have toilets with a nursing table, formally limited to house guests, but usually available on request in the lobby.
Stockholm is safe, compared to other cities of similar size. Beware of waterfront quays, though.
Baltic Sea cruises have child activities.