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    Sciencenter
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    Learners are challenged to create solutions that conduct electricity and make a buzzer buzz (or an LED light up). They are given water, salad oil, alcohol, and vinegar as liquids, salt and sugar as...

    Over $20 per group Ages 4 - 14 10 to 30 minutes
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    The Exploratorium
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    In this activity, learners light an LED with five cents. Learners use two different metals and some sour, salty water to create a cheap battery. Learners also have the option of checking the...

    1 cent - $1 per student Ages 8 - 18 10 to 30 minutes