The Trampoline Slam Ball by Wembley is a fun and exciting backyard game that combines elements of volleyball and dodgeball. Players hit the included three balls against the trampoline, with the goal of getting them to pop and land in the air for a fun and interactive playing experience. The set includes one trampoline, one pump, three balls, and a convenient bag for easy transport and storage. Perfect for outdoor sports and backyard games, this spikeball model is a great addition to any summer fun collection.