iKnowthat.com has online multimedia educational games for kids in grades PreK through 6 (ages 2-12).

Word Carnival Game

Reveal the hidden words letter by letter in this 'Hangman' style Language Arts game. A definition, including a part of speech, is displayed with each hidden word. When a word is completed, it is spoken. A sample sentence is also displayed and may be read aloud. Eight game levels include over 500 vocabulary words commonly covered in 1st grade, 2nd grade, 3rd grade, 4th grade, 5th grade, and 6th grade.

Word Carnival helps children expand their reading vocabulary.