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Discovery bottles- Only use Gatorade or G2 bottles for the sensory bottles they are a heavier plastic so they hold up better and keep a unison look so everything looks good.Make sure to ALWAYS seal your bottles securely with hot glue around the top of the lid.
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.