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One part science
They are designed to hold multiple sets of keys securely
at any age (from kindergarten to switching careers)
So beautifully balanced
The Book of Time science & experiments One part scienceUnravel the mysteries of time, from the Maya calendar to Einsteins wormholes, in this fun and fact filled exploration for young readers. In The Book of Time, curious readers will Description Unravel the mysteries of time, from the Maya calendar to Einsteins wormholes, in this fun and fact filled exploration for young readers. In The Book of Time, curious readers will discover all kinds of fascinating information about how and why we think about time.
