Features Young builders have everything they need to recreate Water Mill Kit with Solar Power Cell This Water Mill Kit with Solar Power Cell drive generate movement with solar energy This Water Mill Kit with Solar Power Cell is fully functionnel Now the young or adults builders can discover the world of the engineering All parts will only be fixed with screws and locked with nuts You have a instruction manual with pictures for easy assembling Recommanded for kids +12 years and up Made of high quality metal and high quality plastic material Specifications Difficulty level: 4 out of 5 Set up time: About 7 hours Number of Parts: 625 Parts Dimensions: 7.9" L x 6.1" W x 6.1" H Weight: 2.8 lbs