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.
It is indeed too early for a baby to understand the blockchain, even adults still find it difficult to understand the blockchain. Babies are a period of growth where a baby should be given character education.
You'd be amazed at how fast it is for toddlers to pick up on patterns and technology! My nephew works the IPAD better than some of our coders and technicians, and she is just 5 years old.