Developmental stages of children aged 18 months to 8 years! These are the child developmental milestones as found for free at the popular Observant Mom website—but now in calendar form! These milestones are the notorious “stages” or “phases” that children go through. These are those times when children “act up,” but it’s because new skills are emerging. This work documents both what the irritating behavior is and what the new skills are. Simply enter your child’s due date into the app, and a calendar is generated with their expected developmental milestones. Simply click on any colored date and get instant information about your child! Add as many children as you want. Countless have said that this work helps them stay patient as a parent or caregiver. Be sure to share this information with family and friends. It’s not misbehavior: it’s growth!