nono, absolutely not for fathers of 2 and 5 year old boys, unless the father happens to be pretty rich.
as I said earlier, kids have magical ways of demolishing your stuff. And nordlad seems to agree, with his comment on Murphy's Law.
Everything that can break, WILL break, and anything not expected to break, is likely to break anyway.
I also have a friend whose infant daughter destroyed his keyboard by vomiting on it while she was happily sitting on his lap. When kids puke, they rarely show signs of distress. Nordlad won't know until too late.
If the father is not a fan of mech keyboards, I think a good rubber dome like Logitech is suitable for him.
If he is fond of mech keyboards, a Realforce silent will be a good choice.