In an era of packed schedules, screen time, and intense focus on school readiness, many children are playing less than in previous generations, which harms development.

Child development is rarely a straight path: While many children progress smoothly from milestone to milestone, others may race ahead in one area and develop later in others. Disability, extended ...

The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond their ...