Shore excursion with 3rd party companies for Kiel, Wernemurde, Ijmurdent, Zeebrugge

We will be traveling on Norwegian Sun June 1-7th and I am looking to do excursions outside of the ship offered ones. Looking for recommendations for La Harve to go to Normandy; Zeebrugge, Ijmurdent to Amsterdam, Warnemurde for somewhere other than Berlin and Kiel. Thank you