Thanks James. I would heed your advices. I have tried to restrict him from using the pc for long hours.By the way, I have bought tickets for Singapore Education Summit in the mentioned earlier post. I look at the event website and spoke to the customer service officer and find it really beneficial to go...International speaker like Andrew Matthews and renowned local educators are speakers for the event..hahah.. Also, I am a fan of Andrew Matthews..thats why I would like to take the opportunity to seek advices from him regarding my child during the lunch session...:)