It is tempting when you know a lot about chess to try and teach it all to your young child, all at once.  This is the wrong approach.  What will happen is they will become "bored" with the game and "become interested in other things".

Keep your chess lessons short and sweet in the beginning, especially if you are working with a very young child.  Take it step by step and make sure they understand each concept before moving on.

Some concepts may take longer than others to master.  Each child will learn at a different pace, picking things up at their own speed.  It really doesn’t matter how long it takes for your child to learn.  If they get it and can use it, chances are they will love chess.

Start with the names of the pieces and how they move.  Plan to spend some time on this.  If you are working with a very young child (age 5 or younger), start with the Rook and Bishop and end the first lesson after they have mastered these pieces.

Enjoy this time with your child.  The bonding experience will be memorable!