I will not pressurized my kids to learn about bitcoin at that early stage and I will ask them to have concentrate on studies and have fun in their childhood days instead of getting them into money matters.
And under pressure at any age it is not interesting to find out something. You need to interest the child with a game with which you can earn money, and then he will begin to more seriously explore the market.
Yeah a bitcoin faucet site with various games would be the best idea. The player will be rewarded with bitcoins when the he wins. It will also feature fun cartoon bitcoin educational videos where the player can watch to multiply his score. I got this idea from google play apps where you can watch ad videos to multiply your scores. The child can learn bitcoin in a fun way.