saving bitcoin for a child is a great idea, as it is very useful for the future. I save bitcoin for my child as a savings for the future, keep my wallet and keywords only me and my husband who know to be safe.
You can construct complex redemption conditions. For instance, you could stash some coins at a P2SH address that requires you to wait a certain amount of time before you can redeem them -OR- that requires M-of-N other parties to sign for "early" redemption.
SO they cant fuck around and kill you for a delicious, premature bitcoin inheritance ; damned kids and their lethal tendencies.
Someone needs to make an eth contract for this they would be rich *wink* *wink* *do it someone dammt*