Attention deficit hyperactivity disorder (ADHD) significantly impairs children’s academic achievement, emotional development, and social functioning by disrupting sustained and selective attention; however, while traditional interventions remain standard, they often struggle to maintain long-term engagement and motivation. In contrast, emerging research suggests that Virtual Reality (VR) presents a promising immersive alternative that can enhance therapeutic outcomes through dynamic interaction; therefore, this pilot study evaluated whether a VR-based intervention improves attention in children with ADHD more effectively than standard psychological support. To this end, ten children aged 12–13 with clinically diagnosed ADHD were randomly assigned to either a VR group or a control group; subsequently, the VR group completed twelve immersive sessions over four weeks, and attention was measured pre- and post-intervention using the D2R Test and the Bells Test. The results indicated that, within the VR group, there were significant improvements in concentration and reductions in error percentage, as well as more correct responses and faster task completion; moreover, between-group comparisons revealed significantly greater gains in the VR group across both measures. Overall, immersive Virtual Reality significantly enhances sustained and selective attention in children with ADHD; thus, these findings support the integration of VR interventions into therapeutic settings and highlight the need for further research in larger-scale trials.