The highly successful Scottish space school at the University of St Andrews took off again earlier this month.
Scientists are guiding schoolchildren from across Fife through a series of workshops on everything from building robots and setting off rockets to looking at the moon and Venus through the telescopes at the observatory.
The programme will culminate with a summer school in June when astronauts from the Johnson Space Centre in Houston in the United States will work with the P6 pupils.
Mike Johnson, senior schools liaison officer at St Andrews University, said: "This is a great opportunity for these primary pupils. Through this initiative we hope that the children will not only learn more about space, which is part of A Curriculum for Excellence, but also find out what it is like to be a student at St Andrews.'
Sixty pupils will attend six Saturday sessions as well as a summer event with NASA scientists and astronauts.
Due to the popularity of the school programme, additional dates have been added - June 25 and 26.