Building Hydraulic Construction Vehicles Toys,Kids Engineering Truck Set with Bulldozer, Grab, Fire Engine with 3 Interchangeable Parts,Hydraulic Excavator Toys for Boys Age 8-12

About This Product :

• Learn through playThis STEM building hydraulic excavator toys uses 3 hydraulic systems to drive the model and realize the corresponding actions.It introduces kids the application of Pascal”s principle and the law of conservation of energy,and nurtures children”s hands-on skills and curious minds,and develop logical thinking and problem-solving skills.
• Hydraulic driveHydraulic engineering toy car does not need batteries and motors, joystick water pressure into kinetic energy, can easily control the mechanical arm for digging, lifting and other functions.
• What IncludedThe hydraulic engineering toy car is composed of 168 parts, with a very detailed manual, including a body and main operating room, and three types of mechanical arms, namely bulldozer,grab, fire engine. You can scan the QR code on the box to watch the installation video and electronic instructions.
• Assembly precautionsDon’t lose the oil package, some parts need to be coated with lubricating oil;don”t remove all the parts at once,It will go much smoother to assemble in the order shown in the instructions;use the cutting tool to remove the plastic parts of the pouring port to ensure that there is no sharp or jagged edges;when injecting water into the hydraulic pipe, be sure to remove all air bubbles.
• Preferred toy giftIt”s a very challenging STEM Building Hydraulic Construction Vehicles toys, Science Experiment Kit for kids age 8,9,10,11,12, very suitable toy gift for birthdays, Christmas, Easter and other festivals.