A lemon is a fruit that is sour to the taste. Combined with a little sugar, these yellow fruit really shine. Lemons are used in cooking, especially baking of yummy desserts. Lemons are also used in drinks, such as cocktails and of course lemonade. Kids love to make lemonade in the summer and sell it to people in need of a drink at a lemonade stand. The recipe for lemonade is very simple - lemons, water, and squeezed lemons.