He has a shoe filled with pond scum he stepped in on the way to school. She has a tuna sandwich for her lunch. Ms. Frizzle thinks it's a brilliant combination. On the class field trip to the ocean, Arnold and Keesha search for the connection between scum and tuna. From inside the tuna's stomach, Keesha makes the connection.
Scum is a kind of algae and algae and tuna are part of the same food chain.
With this activity, your kids get to eat while they act as links in the food chain. Kids color and cut out their symbols and tape them to yarn to make necklaces. Have children spread out around the room, or go outside if possible. The sun holds all 12 bags of popcorn. She gives one bag to each plant.