Our body design, particularly limbs and teeth function effectively for most of the foods we eat. Students will be able to describe three attributes that determine what type of food we are designed to eat. Pound crackers until they are finely ground. Place graham cracker crumbs and sprinkle the seeds on individual plates, and give each student a straw.
Students suck crumbs through their straw until their plate is clean.
They should avoid the seeds so they don't clog the straw. Older children should not use their hands to move the straw across the plate. Scavengers in the ocean often get nourishment by sucking sediment in and processing organic material. Non-nourishing material is processed through and eliminated as waste. Trilobites ate in this manner.