3-In-1 Building Block RobotThis 408PCS building block toy set can be assembled into 3 models:RC Tracked Car / RC Robot / RC Racing Tank. Children can choose one of the models to build freely according to their own preferences.In the process of building, learning and remotely controlling robots, children can not only cultivate their patience and concentration, but also develop their hand-eye coordination, logical thinking, programming thinking and creativity. Dual-Controller Kids RobotsThis educational STEM toy can not only be controlled by a 2.4GHz remote control,also can be controlled by phone APP.The APP control function supports 5 modes of gyro, remote control, driving simulation, navigation path, and programming (freely switchable), bringing a new remote control experience to children.The remote control distance of the robot/tank/tracked vehicle is 25 meters (the APP control distance is 9 meters). 360 Degree RotationThrough remote control, the children's creative STEM robot can flexibly move in all directions on the flat floor. The head and hands of the robot can swing from side to side.Powerful tracked chassis and new upgraded gearbox make the tank and car models can roll and rotate 360.Please note that the remote control requires 2 AAA batteries (not included in the package).RC Tracked Car/ RC Robot/ RC Racing Tank need to install 3 AAA batteriesnot included the package). 100% Safe for Children VINTOP Remote Control Building toys are made of ABS plastic that has passed child safety certification, no peculiar smell, and no harmful additives.The surface of the building blocks is smooth and burr-free, safe and durable.For the safety of your children, we strictly monitor the quality.