(A) Reference Tools

 Text to Speech
  http://text-to-speech.imtranslator.net/
 Yahoo! Dictionary
  https://hk.dictionary.yahoo.com/


(B) Grammar/ Vocabulary Building

 Starfall
  http://www.starfall.com/
 Most Popular Vocabulary Games
  http://www.vocabulary.co.il/


(C) Fun Games

 British Council – Learn English Kids
  http://learnenglishkids.britishcouncil.org/en/
 English Campus
  http://www.hkedcity.net/english/
 Online Games
  http://www.pbs.org/parents/fun-and-games/online-games/
 Interactive Sites for Education
  http://interactivesites.weebly.com/language-arts.html
 Fun Brain
  http://www.funbrain.com/
 The Leader in Educational Games for Kids
  http://www.abcya.com/
 BBC Cbeebies
  http://www.bbc.co.uk/cbeebies