Mark Wahlberg went on "Ellen" and said he's working on a "Captain Kangaroo" reboot . . . partially because he's been "trying to figure out cool ways to get his kids interested in science, technology, and engineering." Mark said it's very early in development . . . and there isn't a network or host attached yet. But that they're planning on making the new 'Captain' a S.T.E.M. program scientist. The original show was hosted by Bob Keeshan in his trademark red jacket with oversized pockets, hence the name, 'Captain Kangaroo.' It ran for 38 seasons, from 1955 to 1984. In all, there were more than 6,000 episodes.