This offer is good Sundays through Fridays for lunchtime cruises in July and August.
Complimentary children's tickets are available with the purchase of one full-price adult ticket. There's a maximum of two per order.
Reservations are accepted by phone only. To book, call 866-455-3866 and mention promo code KCF (Kids Cruise Free).
To find out more about the Spirit of Philadelphia cruises, click here.