Kids can be taught about bitcoins with reference to gold as how we buy gold and store it and sell when prices are high. This should work for the trading aspect, while using bitcoins as online money can be taught much easily because kids today are very much into technology and internet. They can understand the concept of Digital money quite easily because they are still in learning stage and thus will grasp easily.
I think trading and investing is a serious thing and should not be learn by kids because they are still young and their interest is not yet on serious things. They can be taught but the question is, will their interest will remain in bitcoin?
For sure the trading and the investing is not a joke but our kids are our future so it is the best thing and the best time to teach our children about the bitcoin, I think the mind of the kids is more sharper than the elders and they are able to clear the thing more easily than the elders. It is easy o tell them the importance of the bitcoin and the income of the bitcoin will be able to give us the high income indeed.