Make a copy of Activity Sheet 2.1A for each person. Doing the Activity Ask participants to think about a cat or dog. Using a flip chart, record their answers. Ask participants if they can name these tiny things. Explain that cells are the building blocks that make up all living things.
Cells build animals from tiny living things to romping and stomping pets.
Ask if they can guess how many cells adult humans have. They can try. Explain cell theory to your group. Virtually all living matter is made up of one or more cells. Each person in the room is made of cells, and the construction instructions for those cells came from other living things.