I wouldn't risk it, because by the time she may use it, it might be a little risky as its' value could go up or down.
Yeah but it could potentially be a great gift imagine how much it can go up in the future and then the baby will thank you forever. Anyways i dont think it will lose its whole value and maybe you could manage it for the baby until he or she grows up!
So you're basically placing some sort of bet for your children? :p
I wouldn't put all their savings on Bitcoin, but I would story like 1 or 2 btc for them to use in the future.