(hypothetically) When I die I'd like my children to have all my bitcoins. So I was thinking of writing a will to give each of them equal amount but to make it more fun I'd hide the keys from my wallet and make it a quest.
Why don't you just simply make each of your child a wallet and divide your bitcoin and send it to each of their wallet,
seems like it is easier that way instead of putting it in your will just make sure to give them all the information they need to be able to use it.