The Knex XBattlers Attack Your Opponent X-Thrasher Building Set is a 94-piece set designed for ages 7-12. With a focus on the X-Battlers theme and X-Thrasher design, this set allows kids to create and play with a variety of unique structures and machines. The set incorporates tinkertoy parts and offers a fun and educational building experience for young builders. Featuring rare pieces and ties to the Cars character family, this set provides hours of creative play and imaginative construction for kids.