Comment Classical Education based course (Score 1) 364
Some aspects of what you're asking for fall under the category of Computer Literacy and some Computer Science / Programming. I'm building a course right now based on a Classical Education format (popular in homeschool courses). It will target 6-9 year old kids, so it may not be in your siblings' age range, but I'll have some follow on courses that I'm already planning. I hope to ultimately get it to the point of being a comprehensive curriculum that incorporates programming and computer literacy and take a child from grade school all the way through high school.
The first course is not ready yet, but I'll be selling it as an eBook on http://mykidcancode.com/ (@mykidcancode on twitter)
Good luck.