1、WIDE APPLICATIONS: People bought it for kid's science project, physics or mechanics learning, demonstration on class, etc. 2、METICULOUS DESIGN: It's a well designed and crafted mechanical toy, great to display basic principle of external combustion engines. 3、PERFECT GIFT: It is an amazing gift for anyone interested in science . Many people bought our machines as gift to families, teachers, friends, boyfriends. 4、CLASSICAL: With elegant design and fine workmanship, this is a beautiful piece of art. Many people are satisfied with the fit and finish of our engine. 5、SAFE FOR KIDS: Made of high quality materials, exquisite and beautiful, the modle is the perfect combination of texture and beauty. Item Type: Engine Model Material: Aluminum Color: Blue Product Size: Approx. 13x9cm / 5.1x3.5in Weight: Approx. 255g / 9oz Application: It's a well designed and crafted mechanical toy, great to display basic principle of external combustion engines, 1 x Engine Model 1 x Instruction Manual