Jaylene studied shadows by doing this little shadow experiment.
Materials:
Balloon holder
Straw
Clear tape
Thick white paper
pencil
Tape the balloon holder to the middle of the white paper. Squish the end of the straw a bit and stick it in. Then place the paper outside (weigh it down if necessary) and copy the shadows at various times during the day (without moving the paper). If you can’t leave the paper out, be sure to remember exactly where you placed it. You can extend this over several days. Make sure to note the time and/or date when you measure it.
Julie K in Taiwan 
2 comments
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June 13, 2009 at 10:05 pm
Cam
Good experiment!
June 16, 2009 at 12:53 am
Brenda Marks
Love this experiment. I remember in 5th grade trying to express how I saw the sunset move across the sky as the year progressed. I used to do the dishes every evening and saw the sunset on every clear evening, so I knew it was true. My teacher said I was crazy. Hmm.