Guess My Rule: Snack Time

A white plate is the circle. Snacks on the plate: A bagel. An apple. 2 tomatoes. A round cracker. And a round orange slice. The snacks not on the plate: A graham cracker square. A mini bell pepper. A fruit bar rectangle. A cheese square. And a tortilla chip triangle.
  1. Some foods belong in the circle, and some do not. There is a rule to decide what belongs in the circle. What is the rule?
  2. Which foods belong inside of the circle? Circle them. How do you know?
4 snacks. 1st a round rice cake. Next a piece of cereal with 6 sides. Then a blueberry. Last a twisted pretzel stick.
  1. Draw or tell about another food that belongs in the circle.