Behaviors such as screaming, wandering, and physical aggression occur in over 50% of persons with dementia. Therapeutic recreation activities have demonstrated promise as interventions for these dementia-related behaviors; however, few activities have wide appeal and caregivers continue to express the need to find activities that keep persons with dementia engaged in meaningful pursuits. This article describes a treatment theory for selecting activities that match both skill level and personality style of interest, and a pilot study that tested the effectiveness of these activities. Ten nursing home residents served as their own control in a crossover experimental design in which they were assigned to treatment and control activities for 12 consecutive days, each in a random order. Treatment activities resulted in greater subject engagement and more displays of positive affect. During treatment, there were fewer days when dementia behaviors were exhibited than during control activities.