Children with attention and executive function disabilities often have a long-lasting need for rehabilitation to support their functional ability. Yet the availability of rehabilitation services is insufficient, regionally unevenly distributed, and unequal in terms of access to rehabilitation. There is a need for easily accessible services. In this paper, we present the VREALFUN project where the major aim is to develop a novel Virtual Reality (VR) rehabilitation method for children with deficits in attention and executive functions. This ongoing Randomized Control Study (RCT) includes two arms, one in children with attention deficit hyperactivity disorder (ADHD) and the other in children with mild to moderate traumatic brain injury (TBI).