Andy Clark, age 7, of Huntington Beach, California, for his question:

How many cells are in a person's body? ,

Nobody has counted them one by one, so we can only guess the exact number. Even the experts can only guess and different experts give different numbers. Some say that there are more than a million million cells in a person's body. Other experts say that there are more likely sixty million million. And some say there assay be as many a hundred million million. Of course, no person could count any of these big numbers, not even in a whole lifetime.

Naturally you can count to 100 and maybe to 1,000. There is room in a letter 0 for more than ten thousand little living cells. If you counted for years and years, maybe you could get to one million. There are a million cells in about one square inch of your skin,  And that's just the ones on the surface. The flesh under the skin and the bones under the flesh also are made of tiny cells.