The website, yheart.net, aims to help young people to find out how the heart works and how to keep it healthy.
Website visitors will be encouraged to take part in challenges on topical issues to win points that can be exchanged for gifts. There will also be monthly competitions to win iPod shuffles and HMV vouchers. Visitors to the site can also play games and download screensavers.
The website also contains a password-protected area called Meet @ Teen Heart, which is aimed at teenagers with heart conditions.
The foundation is also crating a campaign for 11- to 13-year-olds in January to drive them to the website.
Heart health programmes and resources manager for young people Debbie Allen said: ‘There is a lot of conflicting information available about heart health, but not a lot of it is turned into action.
We want teenagers to think about what they eat and to be aware that they need to do physical activity. The website aims to do this in a fun way.’
It is estimated that 4,600 babies with a heart defect are born in the UK every year. Heart and circulatory disease is the UK’s biggest killer and 208,000 people died of it in 2005.