Have each child make a paper or cardboard groundhog stick puppet with a Popsicle stick. First thing in the morning, carefully stick the stick into the ground so that the groundhog is standing up. Then measure the shadows at 1 hour intervals throughout the day. Chart shadow lengths. Then at the end of the day, discuss why the lengths and directions of shadows varied.
Measure children’s shadows standing in the same place at different times of day.