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1
The planets and stars : with cereal boxes, straws, baby food jars, paper plates and simple things
Format: Book
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2
Pendulums : with paper clips, pennies, thread, tape and simple things
Format: Book
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3
The earth, moon & sun : with paper plates, bottles, tennis balls, and simple things
Format: Book
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4
More metrics : with scissors, tape, straws, seeds, and simple things
Format: Book
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