2 The didn't went with your parents. They went with your grandparents.
3 They didn't wore their school uniform. They wore their casual clothes.
4 They didn't saw an exhibition about the ancient Greeks. They saw an exhibition about the ancient Egyptians.
5 Tom doesn't took his MP3 player with him. Tom took his digital camera.
6 Lucy doesn't bought a book from the gift shop.
Lucy bought some pencils.