Say what you or your family members were doing last sunday evening . use while and when

Last Sunday evening we decided to stay at home and play cards. While we were looking for the cards, my sister found an enormous puzzle (4000 pieces!). While we were arguing about cards and puzzles, she opened the box and could\'t believe her eyes! Instead of the puzzle there were a pair of shoes she had bought as a gift for our 90-year-old granny! When we called granny she said, \'I was solving it for three days and has almost done it!\' She felt proud of herself and thanked us for a nice gift!