Inclusion Criteria:  Child over 6 years of age on the day of acceptance of the study (no upper limit) Suffering from sickle cell disease whatever genotype Admission in hospital for a VOC (vaso-occlusive crisis) Informed and signed consent by at least one legal guardian, if child is minor, and verbal agreement of the child himself.  Exclusion Criteria:  Deaf patient, visually impaired patient, claustrophobic and/or aquaphobic patient Patient not understanding French History of psychiatric illness such as paranoia, schizophrenia, manic-depressive psychosis, high suicide risk patient.  The patient may be included several times in the study if he is hospitalized again during the inclusion period.