Someday I, Marc the Magnificent, will be famous."" So a frumpish little boy fantasizes, conjuring images of TV stardom, command performances, and wide acclaim--while in reality, between daydreams, he is seen trying unsuccessfully to make a coin disappear up his coatsleeve. At last, ""There, I did it!""--and he's on his way. Now you see it, now you forget--but the recognition value of both Marc's difficulty with the basic trick and his wild dreams of success give this a fleeting appeal.