The Reagan family poses for a portrait in 1966 during Ronald Reagan's successful California gubernatorial campaign. The Reagans' son, Ron, pictured above as a young boy, has written a memoir, "My Father at 100" to mark the 100th anniversary of his father's birth. <b>Watch an interview with Ron Reagan on "20/20" Friday at 10 p.m. ET. <a href="http://abcnews.go.com/Politics/slideshow/ronald-reagan-100-12583256" target="external">CLICK HERE to read an excerpt of the book.</a></b>

When Ronald Reagan hosted GE Theater on television in 1960, the company built him a home "stocked with all the latest electric gadgets," Ron Reagan wrote in his book.

Ronald and Ron Reagan share what the younger Reagan calls "a classic Dad and lad moment."

Ron hits his father, then the governor of California, with his "first ever snowball."

Ronald Reagan helped avert tragedy at the family's Sacramento home by rescuing a little girl from the bottom of their backyard pool during a party, Ron Reagan writes.

Ron Reagan shakes hands with his father in the Oval Office. Ron wears a bow tie that he described as "a clip-on satire of a then-current conservative affectation."

Ron Reagan has also been a political commentator and the host of television and radio programs.