IT CAME FROM OUTER SPACE

``We were all in school when...an alien spaceship crashed through the roof,'' reports the narrator, who goes on to describe how frightened they all were of the ``Monster'' that climbed out and lumbered after them, finally removing its helmet and revealing a face as horrible as they had feared. Still, it was friendly, and they took a picture to remember it by before it flew away. In the generalized, attractively colorful illustrations, the children are cleverly posed so that their faces are never shown until the end—when it develops that they are three-eyed and green, whereas the ``monster'' is a fresh- faced human. Satisfactory sf for the youngest, with a salutary message as a dividend. (Picture book. 4-8)