The aim of this study is to investigate the efficacy of neurofeedback (NFB) to improve attention, memory and processing speed in children treated for a Brain Tumour (BT). In the Netherlands every year approximately 100 children are diagnosed with a BT. Nowadays over 65% of these children have a 5-year survival. Treatment for a BT consists of neurosurgery and / or local or craniospinal radiation and / or adjuvant chemotherapy. Neurotoxicity caused by radiotherapy and / or chemotherapy (especially methotrexate) is a major cause of neurocognitive decline in Childhood Brain Tumour Survivors (CBTS).