Many people decorate their homes at Christmas time. These decorations and the Christmas tree are generally inside, but may be put where they can also be seen through a window by people passing by. In the mid 20th century there grew up a custom for decorating the outside of houses as well. These decorations may be just a few lights around the porch, or hundreds of lights and colourful Christmas figures decorating the whole house and garden. Some neighbourhoods hold competitions for the best-decorated house, and driving around the streets to look at them has become another family tradition.