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Crazy Contraptionsbuild Rube Goldberg machines that swoop spin stack and swivel with hands on engineering activitiesBookby Perdew, Laura
Published 2019Book
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Biodiversityexplore the diversity of life on Earth with environmental science activities for kidsBookby Perdew, Laura
Published 2019Book
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Wacky Contraptionsgadgets that whiz whoosh whirl and twist with hands-on engineering activities for kidsBookby Perdew, Laura
Published 2025Book
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