Cap'n Crunch's Galactic Crunch was described on the front of the box as a corn cereal "with space-shaped marshmallows." The main cereal pieces were described as "Crunchy, Fun, Flying Saucer Shaped Galactic Cereal." They looked a little like deflated balls. Many believe they were the same pieces found in Quisp cereal. The marshmallows were shaped like an alien, an astronaut, a Saturn-like panel and a rocket ship.
The first 7 ingredients listed on the nutrition panel were corn flour, sugar, dehydrated marshmallows, oat flour, brown sugar, partially hydrogenated cottonseed oil and salt.
The box we were lucky enough to acquire had an activity panel on the back called "The Marshmallow Shuttle" with a spot-the-differences puzzle.