My daughter is getting married and somehow I got the task of planning her surprise wedding shower. Since almost every woman at the shower will be Polish and our family is not, I want to play one shower game with written instructions in English and in Polish. My idea is to have a large bowl of candy hearts on a table and the guests have to guess how many candies are in the bowl in order to win a gift basket. Therefore, I need to know which of the following sentences is correct. I got these versions from the internet (free English to Polish translations). I have no idea which is the correct one to use for the two signs that I am making. I'd hate to embarrass myself and my daughter by writing the wrong words. Please help!

ARE THESE CORRECT?
Guess how many candies are in this bowl for a prize.
Zgadnij, jak wiele cukierkow sa w tym miska dla nagrode.

Write your answer and name on paper.
Zapisac swoje odpowiedzi i nazwe na papierze.
or
Napisz swoja odpowiedz, imie i nazwisko na papierze.
I appreciate your help but I really need to hear from someone who speaks Polish fluently. I've tried the free online English to Polish translators (such as http://www.poltran.com/pl.php4) and they are not grammatically correct, so I've been told).
Kelly, that suggestion would be really appreciated. The shower is a couple months away so I've got time to prepare.