Mezuzah

The first thing that a Jewish family will do when they move into a new home is to put up their mezuzot. A mezuzah is a small box or tube that is fixed to the doorframe of each door in the house. Mezuzot can be all sorts of shapes, sizes or materials. Two little screws that hold it to the doorpost. There is always symbol on it that looks like a crown with three spikes? It is a letter from the Hebrew alphabet. The letter is called shin and is the first
Letter of the Hebrew word Shaddai, which means Lord. Many mezuzot have the letter shin on them as a decoration. Some have the whole word, Shaddai
Written on them.

Inside each mezuzah is a little parchment scroll with the words of part of the Shema written on it in tiny Hebrew writing. They must be written by hand. In the Shema it says 'Write them on the doorposts of your home'. ('Them'means the words of Torah). This is why Jewish people put mezuzot on their doorframes.
The mezuzah is fixed to the doorframe on the right hand side as you go into the house or room. The mezuzah must be fixed at an angle so that the top is nearest to the room. Jews who are very religious will kiss the fingers of their right hand and then touch the mezuzah whenever they go into a room.