Name of scif-fi tv show/movie from the 80's about a spaceship crewed by genius children.?

Trying to find name of tv show/movie from the 80's about a spaceship crewed by genius children. The conceit of the show was that they were on a long (70+ year) journey and that adults wouldn't live long enough for it. Though at the end of the show/mini-series, they discovered a bigger spaceship that their... show more Trying to find name of tv show/movie from the 80's about a spaceship crewed by genius children. The conceit of the show was that they were on a long (70+ year) journey and that adults wouldn't live long enough for it. Though at the end of the show/mini-series, they discovered a bigger spaceship that their spaceship fit perfectly into, that would make the journey much faster.

An hour on google/imdb/wikipeida turned up nothing. Any thoughts?
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