Study Design This is a prospective pilot study of 20 subjects who have sickle-cell disease and are admitted to Phoenix Children's Hospital for an acute vaso-occlusive crisis. Patients will be randomized via a random number generator with equal probability of assignment to either CPP (experimental) or standard of care (control) trial arm. Eligible subjects and their family will be approached during the first day of hospital admission for consent to participate and randomization. After randomization, all subjects will be given multiple questionnaires to evaluate their current sleep habits, activity levels, and psychological constructs Procedures During the enrollment visit, questionnaires will be administered to every subject to evaluate current sleep habits, activity levels, pain, and quality of life. Subjects will receive the Actiwatch Spectrum Pro and be given instructions on how to use it.