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Shelli R. Johannes

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Vivi Loves Science: Sink Or Float
Libby Loves Science: Mix and Measure
Cece Loves Science: Push and Pull
Cece Loves Science
Vivi Loves Science
Vivi Loves Science: Wind and Water
Cece Loves Science and Adventure
Cece Loves Science
Libby Loves Science
Vivi Loves Science
Cece Loves Science: Push and Pull
Libby Loves Science
Vivi Loves Science
Penny, the Engineering Tail of the Fourth Little Pig