To play, students each get a bag of the spaceship numbers. There are three
different levels, 11-0 (yellow), 21-0 (white) and 41-0 (green). The outerspace part is layed down at the very top, and the cloud "0" blastoff is
placed at the very beginning. Kids each get a bag of mixed up spaceship numbers, and must put them into order counting backwards from their starting number.