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.