[mrreality68]

Never easy conversation.
But make a will now and then update later so you have a will in the event something happens.
In the now will plan for it to be sold and the steps on the where and the how.
The later will is as your kids get older see if they have and interest or not in your collection and then take some of the recommendations others mentioned above if not interested.
They are so young and I would not want to sell before I see what their interest are or are not.
But be covered either way