Having said that, I think it's a fantastic idea to put aside some satoshis or whatever amount of bitcoin would be appropriate for a newborn. It's a cool gift if nothing else.
I remember that my grandfather told me that back in the day when there was a new family member some families had the tradition of buying something that they knew will be valuable in the future, gold or silver were popular choices but you could buy other stuff as long as it was valuable, and this seems like just a continuation of that tradition but now instead of using precious metals we could use something like bitcoin which will most likely keep existing in 18 years.