Students heading into 4th-6th grades in the fall will be able to construct and make a rocket fly at a Guthrie County Extension event next month. Office Coordinator Vicki Frohling says the Blast Off! course will teach students about gravity and mass while providing lots of fun. There are only 12 spots in the June 24th course, so space is extremely limited. The cost is $20, which includes  materials and lunch. For more information and to register, call Brenna Westergaard at 641-747-2276.