Phase 3: Intervention Parents in the experimental group will be invited to attend the brief prevention Seminar Series on positive parenting which included three Seminars. As the Seminar Series is not a well-evidence intervention, it has never been delivered in Greece before, and there are no other studies that prove its effectiveness outside Australia, a wait-list controlled design could not be justified. Parents in the control group will only receive three leaflets on child health and development, Child Health Information Linked to Development Sheets (CHILDS).