How To Use Second childhood In A Sentence

He's in his second childhood, playing with his grandson's toy trains.
Peter, a 55-year-old distribution engineer at the plant, says his wife believes he is going through a second childhood.
Which also were altogether insupportable did not I pity its condition, in being present with it, and, as the poets 'gods were wont to assist such as were dying with some pleasant metamorphosis, help their decrepitness as much as in me lies by bringing them back to a second childhood, from whence they are not improperly called twice children. The Praise of Folly
Be gentle In old age ; peevishness are worse second childhood than In first.
My grandfather is nearly 90 and in his second childhood.

Be gentle in old age; peevishness is worse in second childhood than in first.
He dismissed Stephenson as a self-serving mythmaker: a puerile grandee, whose assertions were little more than the “dangerous hallucinations” of an isolated old man heading toward second childhood.97 This judgment was perhaps too harsh. Storyteller
Little things calm, second childhood is like a deputy XiaoDaRen.
My grandfather is in his second childhood.
Little things calm, second childhood is like a deputy XiaoDaRen.