Unfortunately, significant problems and limitations exist in the current treatment of children with ADHD. Treatment with stimulants produces side effects, such as sleep problems and loss of appetite, and thus is not ideal or recommended for very young children (Corcoran, 2011; Faraone, Biederman, Morley, & Spencer, 2008). Although pharmacotherapy and behavioural management generally improve parent and teacher reports of children’s social skills, once treatments stop, so too do children’s improvements (MTA Cooperative Group, 2004). Moreover, when parents are stressed or dealing with their own mental health issues, they may not be able to properly implement the skills learned in behaviour training, resulting in more frustration and negative reinforcement of the parent–child conflict (Bögels, Hellemans, van Deursen, Römer, & van der Meulen, 2014). Therefore, it is imperative to investigate other psychosocial interventions that can improve the well-being of the entire family system.