I made a car that carries the balls with Adaptive Cruise Control (ACC). I use Lego’s Powered Up platform. Powered Up has hubs, motors and sensors. So we can program the behavior. This car has a Powered Up hub, driving motor, and distance sensor. The car was programmed to run at a certain distance from the obstacle so that the car does not get too close to the obstacle. I add a car. With the aid of ACC, we can increase the number of cars. The number of balls that can be carried by one car is small. However, adding more cars can increase the overall ability to carry the ball. The car discharges the balls while driving. The car body was made with a focus on compactness. A small body is packed with a Powered Up hub, motor, and distance sensor. This car is small but four-wheel drive. The program is created using the Powered Up app. The car was programmed to run at a certain distance from the obstacle so that the car does not get too close to the obstacle. The loading part was made using a Powered Up move hub. Two motors built in the move hub drive the star wheel and gate. A distance sensor is used to detect the arrival of a car. With the red lever, we can press the green power button on the move hub. The program is created using the Boost app. The car detects the gate and stops. When the sensor of loading part detects the car, it sends out balls. The gate opens when the balls have moved to the car. When the obstacle (gate) ahead disappears, the car starts. After checking the start of the car, the gate closes. The layout was changed so that the balls automatically circulate. I increased the number of cars to four. If the brake is delayed, the cars may touch each other. However, if I reduce the speed of the car, they will not touch. This time I’m focusing on the appearance, so the speed isn’t reduced. A total of four smart phones and tablets are used to control four cars. All cars have the same program. From now on, I increase the sensitivity of ACC so that the car chases the car ahead adroitly and play with it. However, this program is not suitable for carrying balls, because the stop position by the gate becomes inaccurate. If the car gets too close, the car move backwards. I try to put the yellow car in the opposite direction. The cars push each other. The yellow car is pushed by the yellow-green car. I don’t know the reason, but I think it is due to individual differences in sensors, motors, and batteries. I switch the yellow car to manual remote control operation. The cars will follow behind like the duck’s parent and child. Free instructions are avairable at wy website.