Hellooooooooooo, and thank you so much for starting this thread. 
Just to address the comments made -
No, we aren't connected to Let Toys Be Toys, although I do of course support what they are doing.
The site was changed last year to 'Jump! Mag for Kids' for several reasons. Firstly, I had so many requests to do so, because boys were reading it too but felt they couldn't/shouldn't cause it was 'for Girls'.
Secondly, it became clear to me that to improve the lives of girls, we have to reach out to the boys too. Telling girls they can be anything they want to be won't work if boys still think the little woman shoudl be at home folding his socks.
Thirdly, boys are being damaged by our society too. Boys are told to 'man up' and not to 'cry like a girl'. They are discouraged from showing emotions and shoved into manly jobs. We recently ran an interview with a nurse called Danny, who went into nursing in his mid-twenties. He said that he never considered nursing when he was leaving school, it was all 'what about engineering?' The interview was one of the best I've done, because he was just so absolutely bloody happy in his job. It was brilliant to see.
So, my point is that when we say 'Girls, you can be an scientist/architect/astronaut/engineer', we should really be saying, 'And boys, you can be a nurse/carer/primary school teacher/social worker...'
Kickstarter is a crowdfunding platform. Many creative projects find it difficult to get funding from traditional methods - try going to your bank and asking for a loan to start an online business or to publish an album.
The idea with crowdfunding is that people can support a fledgling business, and in return they get a reward - in our case, a substantially discounted subscription to the site.
We need the money to redesign the website, and to pay writers and contributors to the site. I won't be taking a salary until the site is making a profit but am hoping to be able to employ a couple of people part time to help out.