Executive Training and Brain in Children

Inclusion Criteria for all children: * Male or female * Aged 9-10 years at inclusion * French school curriculum (since 1st grade) * Fully informed through the dedicated booklet * Both parents gave their written consent * Normal medical, neurological and brain imaging assessment Inclusion criterion for non preterm children only: \- Full term pregnancy with no abnormal event (\>= 37 weeks of amenorrhea) Inclusion criterion for preterm children only: \- Delivery before 33 weeks of amenorrhea Exclusion Criteria for all participants: * Age over or under 9-10 years old at inclusion * Monozygotic twins * Restrictions to a Magnetic Resonance brain imaging exam: claustrophobia, metallic elements (cardiac implants, cochlear implants, metallic elements in the brain or the eyes and being close to the nervous system, metallic prothesis, braces), restless participants. * Sudden cognitive impairments due to a stroke, head injury associated with loss of consciousness for more than one hour or encephalitis. * Chronic neurological, psychiatric, infectious or liver condition, endocrine disruption. * Past or current medical condition: cancer, diabetes, chronic lung condition, cardiac, metabolic, hematological, endocrine or immunological disorder. * Medication assumed to interfere with brain imaging measures (psychotropics, hypnotics, anxiolytics, neuroleptics, benzodiazepine, steroidal anti-inflammatory, anti-epileptics, painkillers, muscle relaxants). * Left-sided handedness * Colour blindness or non-corrected visual disturbances * Diagnosed developmental disorders * Diagnosed cerebral palsy * Diagnosed Fine motor disturbances * Parents not affiliated to the Social Security * Parents not able to join at each time of the study