Inclusion criteria:  Children aged 2 to 4 years old. Group 2 : Chldren with CHD (as defined in the ACC-CHD classification).  Exclusion criteria:  Other comorbidity affecting quality of life (polymalformative syndrome, extracardiac organ failure, severe genetic disease). Surgical procedure during the last 6 months. Inability to understand the HRQoL questionnaire (parents) :non-french speaker, severe intellectual disability.