Why is black and white good for babies?

When my son was born, I knew NOTHING about how beneficial black and white toys were for babies.
When my son Alfie was born, I knew NOTHING about how beneficial black and white was for babies.

Social Baby Why Black And White?

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How contrast impacts babies' visual development

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Why babies need black and white visual stimulation

Babies and the benefits of High-Contrast Images for Development - Specially Gifted