A randomized, controlled, and evaluator-blinded trial will be carried out to investigate the effects of 8 weeks of upper limb somatosensory discrimination therapy compared to an equal dose of motor therapy on sensorimotor outcomes in children and adolescents with spastic unilateral cerebral palsy aged 7 to 15 years old. Additionally, the potential role of clinical and neurological baseline characteristics on treatment response will be explored, including the extent of the brain lesion, age and baseline somatosensory function. The researchers primarily expect that the bimanual performance will improve equally in children and adolescents from both intervention groups, as measured immediately after the intervention has ended. The researchers hypothesize, however, that there will be a better retention effect in children and adolescents that received somatosensory discrimination therapy, resulting in differences between both groups in bimanual performance as measured at 6-months follow-up. The researchers further expect larger improvements in somatosensory function for children and adolescents in the somatosensory discrimination group and this both immediately after the intervention and at 6-month follow-up.