You were lucky enough to meet the aliens in person. They came to our planet for a reason. They have a definite purpose.
In Search of Bright Life
As it became known, the alien guests went in search of bright colors. The problem is that on their planet everything is monotonous, and they are tired of it. On their saucer they came to visit us.
They landed in a clearing, where they met you. They have pictures for you to color. They are asking you to make them as beautiful as possible. They want the pictures to be as bright as possible, because they are so long looking for this. They promised not to disturb you and flew back home. As soon as they're ready, they'll come back for them.