The toy consists of two big cams. Both cams are similar and is used to create an up and down motion for the clouds and planes. They also generate a rotating motion for the planes as the follower is placed off centre. Thus the planes will rotate and move up and down when the handle is being turned. The second cam has a third function, in that its teeth drive another rotating cam at the back which then allows the backdrop to spin. The backdrop shows the sun following the moon as it rotates. As users turn the handle, the planes will fly up and down above the clouds chasing each another, from day till night.