i think you do not need to teach kids about bitcoins, you just need to introduce them to this global virtual gold. the keen ones will learn about them on their own with time. however there are a lot of ways to introduce bitcoins to kids. you can include them in the kids' school syllabus, create some fun learning apps, include them in kid's magazines, encourage parents to tell their kids about it, spread awareness etc.
This is it, just giving them a short background about bitcoin is already fine. But it's also good if you will teach them all the knowledge you know in bitcoin so that those kids will be educated properly base on the knowledge you have with bitcoin. And by letting them play some good apps is also a good thing for you to introduce them.