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Specification:Note: Not include the battery.Size:90*75mmSending and receiving distance: about 10 meters!Suitable for scientific manual classes, small ..
Feature:The 3D printed differential and differential lock structure models show their basic principles (because they are made by 3D printing technolog..
Specification: Model: ST-4WDVoltage: 6VSize of Car: 280*180*73mmMaterial: AcrylicLength of board :280mmWidth of board : 150mmWeight: 672g Fe..
Specification: Size of Car: 26cmx17.5cmMaterial: AcrylicWheels diameter: 6cmThickness of board : 3mmLength of board :25cmWidth of board : 14.8cmW..
Specification: Size of Car: 260mmx140mmMaterial: AcrylicWheels diameter: 70mmLength of board :260mmWidth of board : 140mmWeight: 564g Featur..
Description: Function: Move forward/backwardScrew structure, easy to assembleSize: 120*80*75mmWeight: 40g Package Included: 1x Mechanic..
Specification: Material: WoodenWeight: Approx. 87gSize: 27X12cmSuitable for: 5-14 yearsFor understanding hydraulic driving device operation princ..
Description: Size: 100*62*50mmScrew structure, easy to assembleAutomatically obstacle avoidance Package Included: 1x Mechanical Obstacl..
Description: Name: DIY Manual Crank GeneratorWeight: 183gSize: 130*90*110mmEasy to assemble Package Included: 1x DIY Manual Crank Gener..