The “Bitcoin For Kids Trilogy” is a book series which claims to teach children how to run a business using Bitcoin. Considering that many of the top Bitcoin advocates have had their Bitcoins stolen through software attacks, this doesn’t seem like a particularly good idea. Coupled with the fact that the primary uses for Bitcoin continue to be gambling, illegal pornography, guns, and drugs, it seems like probably the worst thing you could encourage your child to do on the computer. But, hey, if you think your nine-year-old should be communicating with Russian gun-runners on the deep web, go for it.