Specifications:Magic and creative toy car which is powered by salt water, environmental.Gives children a chance to learn about new forms of clean energy.Develop children's operational ability by assembling the car by themselves.No batteries required just add salt water.Eco-friendly and energy saving.Easy to take out the FC module when not in use.Detailed assembly and operation guide. Usage:Prepare 20%-99% saline solution(best proportion: salt : water=1 : 5).After activating the fuel cell module with a saltwater mixture, the car will start running.The magnesium metal sheet can operate the car continuously(3 sheets included).After the car stop, add some saline solution again to restart it.If you want to park the vehicle simply take out the fuel cell module and rinse with tap water and dry.Wash both negative and positive plate using clean water after used.This toy car can be used for 60-70 times. Type: Toy CarMaterial: ABS + Electronic ComponentsFeatures: Creative, Educational, Salt Water Fuel CellSize: 7.5cm x 4cm/2.95" x 1.57" (Approx.) Notes:We don't provide saline solution.Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes:1 x Toy Car