Text and photographs provide examples of back and forth movement, including the pendulum on a clock, a child in a rocking chair, and waves on the shore.

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#1 NEW YORK TIMES BESTSELLER • A special 25th anniversary edition of the beloved book that has changed millions of lives with the story of an unforgettable fr

Ethan loves both his mom and his dad, but going back and forth between two homes is hard! Joint custody allows children whose parents are divorced or separated

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