Articles writers on popular science content for kids

I urgently need an excellent writer who can write and immediately deliver 20 high quality original articles relating to popular science or fascinating science facts appropriate for kids (ages 8-12 yrs). Although the article is expected to be appropriate for kids, the content must equally appeal to parents and adult readers. The article must be original and convey something fascinating and interesting around science. Each article should be around 500-600 words. The headings must be catchy and the content should be thoroughly readable. The articles must be SEO optimised with key words included appropriately. I will pay $5 for each article. You must be a native english speaker or having excellent writing skulls in english. Your language and articulation capabilities must be impeccable. You must have passion for writing on science subjects appealing to kids. Your articles must be free of spelling mistakes, grammar errors and must be correctly punctuated. Articles should be original and unique. Plagiarism is strictly prohibited and will disqualify for payment. Content must pass 100% copyscape premium test. The copyright to the content purchased will vest with us and you are not allowed to resell, reuse, rewrite or give away these articles in any way in any future context. If I am pleased with this writer, I have an immediate follow on work for writing weekly blog articles on parenting issues and also for providing content for an ongoing science newsletter targeted at kids. There is more work in pipeline which can be discussed in due course. Please bid only if writing is your passion, have a flair for writing for kids and you are a subject matter expert on science. Payments will be provided on satisfactory completion of work only and will be paid through GAF/Paypal. You should be available on skype/google talk for interaction. Provide reference of any sample work to speed up evaluation.