Comprehension of the quantifiers "some" and "all" was studied with 202 children, three to nine years old. Thirty-two quantifier sentences dealing with descriptions of circles and squares were presented to the children. Wooden objects were presented to some children to see if results were affected by the choice of abstract objects, but no differences were found. The relationship of "over-interpreting" quantifiers to acquisition was analyzed. "Over-interpretation" is to understand "all" as occupying both possible sentence positions: as a sentence quantifier and as a quantifier in an adjective phrase. Interpretations of "all" as an adverb and as an adjective are analyzed, and deep structure positions and over-interpretation are discussed. "Double-some" sentences, the extensive"some," the intensive "some," reversals, and quantifier order are also discussed. (SW)