Alchemy Lab event at Groton Public Library

Brendan Kiernah, left, 10 years old, feels how cold water gets when you mix it with calcium as friend Oliver Dvorak, eight, looks on during an Alchemy Lab on Tuesday, December 12, 2017, at Groton Public Library.  The event, put on by the Connecticut Science Center, provided kids the opportunity to experiment with chemical reactions.  (Sarah Gordon/The Day)
Brendan Kiernah, left, 10 years old, feels how cold water gets when you mix it with calcium as friend Oliver Dvorak, eight, looks on during an Alchemy Lab on Tuesday, December 12, 2017, at Groton Public Library. The event, put on by the Connecticut Science Center, provided kids the opportunity to experiment with chemical reactions. (Sarah Gordon/The Day)

Brendan Kiernah, left, 10 years old, feels how cold water gets when you mix it with calcium as friend Oliver Dvorak, eight, looks on during an Alchemy Lab on Tuesday, December 12, 2017, at Groton Public Library.  The event, put on by the Connecticut Science Center, provided kids the opportunity to experiment with chemical reactions.  (Sarah Gordon/The Day)

Friends Charlotte Monroe, left, and Alrya Speed, both eight years old, listen to the sound made by two chemicals during an Alchemy Lab on Tuesday, December 12, 2017, at Groton Public Library.  The event, put on by the Connecticut Science Center, provided kids the opportunity to experiment with chemical reactions.  (Sarah Gordon/The Day)
Friends Charlotte Monroe, left, and Alrya Speed, both eight years old, listen to the sound made by two chemicals during an Alchemy Lab on Tuesday, December 12, 2017, at Groton Public Library. The event, put on by the Connecticut Science Center, provided kids the opportunity to experiment with chemical reactions. (Sarah Gordon/The Day)

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