My son, who hated writing and didn't particularly like looking up words in a regular dictionary, loved looking up words in his Franklin Merriam-Webster electronic dictionary. He could go to church and look up any words the preacher used that he didn't know the exact meaning of and when I read classic books to him containing some words that I wasn't even sure of the exact meaning, he would ask me what they meant and then check it out with his electronic dictionary. He could also play hangman on it and it could also be used as a calculator. I think typing in the word also helped him learn to spell correctly.
But the Vocabulary Cartoon books probably helped him the most when he was seven. After he finished reading all of them he started making up his own funny mnemonics and he really enjoyed doing this.
He likes freerice.com also. If he misses a word he remembers the correct definition the next time he sees it.
