My father has an unusual hobby: carving eggshells. As everyone knows [ ế sé ve ri one nâu]( như mọi người biết đấy) , eggshells are very fragile (dễ vỡ). My dad can make beautiful pieces of art ( một vài tác phẩm nghệ thuật) from empty ( rỗng, trống) eggshells. It's amazing! He started ( bắt đầu) the hobby five years ago after a trip (chuyến đi) to the US where he saw some carved eggshells in an art gallery (phòng trưng bày nghệ thuật). My father did not go to class to learn how to ( làm thế nào để) carve. He learned ( = study : học) everything from the internet. Some people say that (nói rằng) this hobby is difficult and boring, but it isn't. All you need is time. It may take two weeks to complete [ khầm pít] ( hoàn thành ) one shell. I find this hobby interesting because carved eggshells are unique [díu nịt k] ( đặc biệt) gifts : món quà đặc biệt for family and friends. I hope that in the future he'll teach me how to do eggshell carving. 1. Why does Nick think his father's hobby is unusual? 2. Where did his father see the carved eggshells for the first time? 3. How do some people find this hobby? 4. Does Nick like his father's hobby?