There are some things that a baby is incapable of really learning and understanding. Until they fully develop an understanding of language primarily and money secondary they need not be introduced to the blockchain. I think really under the age of 5 or so Children should be left to play and learn through fun rather than being subjected to other things.
You are right thou but to be Frank with you babies learn fast most especially when it being presented through pictures and blockchain is not only about the financial aspect alone it involves a whole lots of other factor and digital currency is jist one aspects of it. The blockchain is a network that house almost all aspects of life and even education it self is part of it.