This was an "ABC Afterschool Special", or "CBS Schoolbreak Special", or NBC, or one of those, about a father & son switching places while the son is in sleepaway camp. It was also actually a sequel to "Freaky Friday", in which the MOTHER & DAUGHTER were the ones who switched places. Another sequel was also one of those ABC, or CBS, or NBC whatever specials entitled, "A Billion For Boris", about a TV that has the next day's programming and the kids use it to tell the future. Real cute. Both "Freaky" & "Billion" were based on Mary Rodgers books.
