Thank you everyone for all the valuable suggestions..
More about myself. Currently I am running children education training business for 15 years. It is very tough and need to spend a lot of time on my business. My wife is expecting and our first baby is due end of the year.
I am thinking of doing business that can run from home. So that I can spend more time with my baby. If it grow big, my wife can quit her job and work together on this home online business.
Over the years, I have explored many opportunities. I started with internet marketing in 2005. Went to many seminars.. but found that alot of them are scam.. They buy their own "products" to prove the sales or they photoshop the result. This was the early days of internet marketing.
Then I went to learn stocks and forex. Attended many workshop also.
Currently, still do some forex trading. My skill is not there yet. Not able to earn a consistent and substantial monthly income.
Still exploring for more opportunities. The trend now is on e-commerce. Went for alot of preview for e-commerce business. I went to Qoo10 preview last month, look impressive, but not sure is it do-able for most people. I also google Amazon (FBA) Fullfillment by Amazon, look interesting too.
I am open for more opportunities.
Thank you everyone for sharing.
Wow.. Ic. jiayou!

Ya, no need to go for such Internet Marketing seminars, they usually teach very generic idea stuff, (which can be found online or some trial and error) execution is always the hard part, not the ideas.
I believe since you also have prior business experience, doing business from home won't be as difficult as compared to somebody who doesn't have any business sense
I can't help with Forex, no experience with that, Internet marketing is where I have experience.
Just my two cents, if you like E-commerce, you can start off with Carousell/Amazon. I have a friend who sold vintage items off Carousell and makes 4 digits/month (he didn't disclose exact sum to me) even when he was still a student, so it definitely is possible... Or perhaps you could sell something to your existing clients? something related to the children education training business?
