I'm really 'exciting' (nie, nie to slowo- ale blizko). Dlaczego konczysz 2 zdania z wykrzyknikiem - na kogo krzyczysz?
(na pewno nie bedziemy się nudzić (?))
We can swim in THE sea, eat ice-creams and sunbathe. I also often water ski. Sometimes I watch THE sunset on the beach. It's really AN underscribable feeling. In Gdańsk THERE are more and 'greater' (nie, nie greater, moze larger?) shops than IN your city. I really love shopping! (znowu krzyczysz- na kogo?)
If you want we can visit old and interesting monumentS and visit Sopot. That's also A beautiful city in the area.
I 'have also' (zla kol slow ALSO HAVE the biggest, the most expensive and the best-looking house in the city. I hope 'so' (nie, tutaj nie potrzeba 'so' THAT 'it's' IT WILL be the best holiday in your life!