Teach your child different words of welcome. Rising in the morning, we say "Good morning"going to sleep "good night". Meeting familiar adults, welcome them by saying "Hello", "Hello", "good evening," and the buddies I can say just "Hello". Leaving the guests, do not forget to say "goodbye". Like many words, teach your child to actively use them. Very good to train on toys. Create in-game situations when you need those or other words of greeting, and let the child says them and for myself and for game characters. The use of these words should become a habit for your child. Come up with some of their, family, welcome, something funny.