Knowledge about guns and the relation between play with guns and aggressivity was assessed in a group of 5-9 year old children. Each child was questioned about his gun play and his understanding of guns after he was shown a display of two toy and two real guns. This data was then correlated with a teacher rating of aggression for each child. Children's play with guns was not significantly related to their rated aggressiveness. Further, the children were not able to discriminate reliably between toy and real guns and they held some distorted beliefs about guns. The results are discussed in terms of the aggressive cue hypothesis. (Author)