KRE-O Transformers Sentinel Prime Construction Set (30687) Build your favorite Transformers hero, Sentinel Prime, in vehicle or robot mode with this 2-in-1 set of 386 KRE-O construction pieces Includes 4 Kreon figures: Sentinel Prime, Soundwave, Thundercracker and Fire Chief 2-in-1 KRE-O construction set lets you build Sentinel Prime as a robot figure or as a fire truck In vehicle mode, put one of the Kreon figures inside the cab of the fire truck and help the others climb up the truck's 2 ladders Ages 8 to 14