At lunch time in a Children’s House (preschool & kindergarten) classroom a teacher overheard two 3 year old children talking. They were delighted to notice they each had grapes in their lunches. As they compared the grapes they noticed, then exclaimed, that one had grapes that were spheres and the other had grapes that were ellipsoids.

Check out this video clip of the Montessori geometric solid lesson these boys had in class that brought about their keen understanding of shapes.