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Gordon Penrose
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Dr. Zed's Sensational Science Activities
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More science surprises from Dr. Zed
An illustrated collection of simple and safe science experiments
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[Dr. Zed's] Magic Mud and Other Great Experiments
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Dr. Zed's Science Surprises
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Dr. Zed's zany brilliant book of science experiment …
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Sensational Science Activities with Dr Zed
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