Feature: 1. Use: Place the alcohol combustor at the end of the round end cylinder, pour in 95 percents alcohol, ignite and let the combustor burn the round end cylinder for about 20 seconds, then gently push the wheel. 2. Continuously Working Over 8 Hours: This stirling engine generator has good performance that it can work continuously for more than 8 hours that is very practical. 3. Wood Base: The base of the stirling engine motor is made of premium wood, and the base has a prominent wooden texture and a noble texture. 4. Teaching Significance: This stirling engine is significant that it can help students understand how an external combustion steam engine works. 5. Applicable: This stirling engine is applicable for science projects for kids, physics or mechanical learning, classroom teacher demonstration accessories, birthday gifts for friends, family, parents, kids, etc. Specification: Item Type: Stirling Engine Motor Material: Beech and stainless steel Gross Weight: 412g/14.5oz Applicable: Science projects for kids, physics or mechanical learning, classroom teacher demonstration accessories, birthday gifts for friends, family, parents, kids, etc. Size: 13x8.9x8.1cm/5.1x3.5x3.2in. Package List: 1 x Stirling Engine Motor1 x Alcohol Bottle