The Center for Disease Control and Prevention provides checklists for children’s developmental milestones. Developmental milestones include how children play, learn, speak, act, and move. For more information, please view the CDC’s Developmental Milestones Checklist.
Additionally, these videos provide helpful information about Developmental Milestones:
https://www.fdlrs.org/parent-services/child-development-milestones-red-flags-videos