Fun, easy way to teach the scientific method. "Do taller children have bigger feet then smaller children?" In the picture students collected their data (drew a bar the size of their feet) and used a ruler to measure their graph and record their results.
Scientific Research at its most simple (and most brilliant). It is so much fun watching your little one discover something and share it with others (and vice versa). I have found, though, that most observations are of things or behavior that aren't exactly toddler friendly or examples of "good' behavior lol.