Easy drive (two hours+) or train ride from Berlin. Hanseatic city with picturesque market square, shopping and fountain focal point. Great toyshop, two floors for kids of all ages - Wupatki, Rungestrasse 19, 18055 Rostock. Christmas market in December - try the deep fried bananas! Catch a tram to the imaginative zoo (with good playground), or a train or boat (in season) to the seaside town of Warnemunde. (Wide, sandy beach, good fish restaurants, fish market and lots of boats and ships coming and going.)
Is this your business?