Hey Bipin,
Dubai makes for a fabulous family vacation destination as it offers a variety of grand experiences. I would suggest a 5-6 days trip which will allow you to explore the city in all its glory. If you want to have more unique experiences, you may also visit Abu Dhabi, which is located only a hour's drive away from Dubai. You will definitely want to visit Abu Dhabi to ride the world's fastest roller coaster at Ferrari World Abu Dhabi and an indoor sky diving chamber at the emirate's Yas Island!