Turn key web site bulider

I want to have a website builder on which anyone can register and can have there website running in few minutes like [login to view URL] but my website builder should be fully made in HTML5 and [login to view URL] has 2 section apart from all the features of website builder : 1)website builder for kids (which will have images and easy user friendly access that can be used by 8 year old kid 2)normal website builder easy in use and compatible for everyone there will be a radio button to choose KID or ADULT he will be redirected to the respective builder . Only serious programmer bid no advance payment all payment at once after work is complete you can host on your side and show me if it is good then payment will be made at that instance only