Purpose: Social skills difficulties among children on the autism spectrum can impede social, emotional, and academic development, especially with increasing age and social demands. This pilot study examined the efficacy of a 5-week skill-building program for children on the autism spectrum. Although effective social skills programs are available for adolescents with autism spectrum disorder (ASD), very few programs are explicitly intended for 10-12-year-old children. Methods: This pilot study examined the efficacy of the 9-session Friendship and Emotional Skills Training (FEST Program) for children with ASD without intellectual disability. Participants were 22 children randomly assigned to the FEST Program or a delayed intervention control group. Eleven children (boys = 8; girls = 3) received the FEST Program in two separate groups, and 11 were wait-listed for a delayed intervention. Parents, teachers, and the children answered questionnaires at baseline, post-intervention, and a 3-month follow-up. Results: Upon completing the FEST Program (post-intervention), parents reported an increase in overall social skills (on the Social Skills Rating System -- SSRS) and a reduction on the Autistic Mannerisms factor (on the Social Responsiveness Scale -- SRS) compared to the control group. These changes were also maintained at the 3-month follow-up. The children's assessment also showed a significant increase in assertion (on the SSRS) post-intervention. Teachers also reported a significant reduction on the Autistic Mannerisms factor at the 3-month follow-up. Conclusion: The findings suggest that the FEST Program shows some promising results as one possibility for supporting children with ASD and their families in everyday life.