An onion cell (seen through a microscope)
You can see individual cells for yourself if you can get access to a regular light microscope, perhaps at your school, or at the science museum. Students often start by looking at an onion cell stained with a little iodine to make the nucleus and the wall easier to see.
You can also get a lens that will attach to your iphone camera that will magnify enough to see cells.
Try looking at your hair, or at a drop of pond water that has bacteria floating in it.
More about cells
Bibliography and further reading about cells and biology:
