There are numerous games and puzzles that help a child to increase vocabulary and make the child more fluent in speaking and writing. Remember, building a vocabulary builds confidence. Try crossword puzzles, word games, anagrams and cryptograms designed especially for children. Flash cards are good, too, and they're easy to make at home. Suggest making lists.
Most children like to make lists just as they like to count.
Making lists is good practice and helps a child to become more organized. Boys and girls might make lists of their records, tapes, baseball cards, dolls, furniture in a room, etc. They could include items they want. It's also good practice to make lists of things to do, schoolwork, dates for tests, social events, and other reminders. Also encourage copying favorite poems or quotations from books and plays.