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Imagine where by a hardware wallet is created with the set time capability to release Bitcoin for your children? I have never seen such but I think it's doable, sorry if I make this sound easy as I am not even a developer.
Imagine having a one year old baby today and you set a certain amount of Bitcoin to be automatically available for moving out after 10 or 17 years later, with date and time, I think it's not impossible, if we can stake coins for a year or two before they become available for moving out why can't we lock Bitcoin in our hardware wallet for a particular period in the future?
Well, I am not a developer or a technical expert but just like an ordinary person. I read your post and what I saw is that a new idea that will help the bitcoin enthusiast in the future. We all know that a wallet can not be opened by another person or without the phrase and if let's say you hold 17 bitcoins in your wallet for which you do hard work and earn that bitcoin and after you, no one can open your wallet and all your earned bitcoin will waste if they did not know that phrase. So we need a system through which we can easily open our wallets for our children or us. But the suggestion I think is impossible now because no one can make such a wallet and I have a better solution than this and that is to teach your child about Bitcoin what is bitcoin, why it is valuable etc etc, I am sure after some years he have enough knowledge about bitcoin and will start managing his father bitcoins.