Okay kiddo, so there was this thing called Luna 3. It was a spacecraft that was sent by the Soviet Union to the moon a long time ago, in 1959. Its job was to take pictures of the moon and send them back to Earth.
Luna 3 was kind of like a robot, but it was sent into space by people. It had a camera on it that could take pictures of the moon's surface. The camera was inside a container that had to be picked up by a device on Luna 3 and then turned towards the moon to take pictures. That was kind of like someone holding a camera and turning it to take a picture, but it was done by a machine in space!
Luna 3 was really important because it was the first time humans had ever seen pictures of the far side of the moon. The moon always faces the Earth with the same side, so we had never seen the other side before Luna 3 showed us what it looked like!
After Luna 3 took the pictures, it sent them back to Earth using radio signals. The people on Earth were able to see the pictures and learn more about the moon. It was really exciting for scientists and space lovers all over the world!
So in summary, Luna 3 was a special robot sent to the moon to take pictures and send them back to Earth. It showed us the far side of the moon for the first time ever, and it was really cool!