Whomp - Try to become king of the monsters by spelling as many words as you can in three minutes. - http://fun.familyeducation.com/entertainment/child-online-games/28867.html
Detective Shell's Word Search - Interactive online word search for topics such as basketball, animals, Ancient Egypt, colors, and number words. Requires Shockwave - http://www.learningplanet.com/act/ws/e_wslist.asp
WordPlay - Solve puzzles and play interactive word games. - http://www.wordplays.com/
My Little Word Puzzles - Players have to align letter blocks to form the words in the clues. - http://games.franciscocharrua.com/Word_Puzzles/
Flash Crossword Puzzles - Provides a selection of flash crosswords containing verbs. - http://www.manythings.org/cs/
Word Search Puzzles - A selection of themed word searches. - http://www.word-searches.com/kids.htm
Dictionary.com: Fun and Games - New crossword puzzles and word search games each day. - http://dictionary.reference.com/fun/
Wacky Web Tales - An online equivalent to Mad-Libs. More than four dozen tales to choose among. - http://www.eduplace.com/tales/
Riddleopolis - Riddles test players' knowledge on all sorts of topics. Requires free registration. - http://www.headbone.com/ridopolis/
Merriam-Webster's WordCentral.Com - Offers interactive word games in addition to a student dictionary and Daily Buzzword feature. - http://www.wordcentral.com/
Head Scratchers - Get clues and unscramble words. Hints optional. - http://www.headbone.com/scratchers/
Grammar Gorillas - The Grammar Gorillas need help identifying parts of speech. If you click on the right word in the sentence, they get a banana. - http://www.funbrain.com/grammar/
Fake Out - Choose a word and try to guess its definition. Words grouped by age and ability levels. - http://www.eduplace.com/fakeout/
BlackDog's Word Games - All sorts of games, including searches, jumbles, crosswords, cryptograms, tongue twisters, riddles, and interactive Java games. - http://www.blackdog4kids.com/games/word/