Henry Spencer (Jack Nance) é um reservado operário de uma fábrica que se vê obrigado a casar com Mary X, uma antiga namorada que se diz grávida dele. O bebê nasce uma aberração, que faz com que Mary abandone Henry para ele cuidar da 'criatura' sozinho.
Artful Penny could indeed draw anything she wanted with her magic crayon and it would spring into life. A fantastically useful toy to have. Only her best friend friend Dennis knew her secret so the two had acres of fun winding up adults, nosey-parkers, bullies, bad guys, teachers and ne'er-do-wells with her creations, or solving problems for folk, or sketching their way out of tricky situations. Penny would scribble away, her arm becoming a blurr as she worked and then - hey presto! - her line drawing would leap off the drawing surface as a fully-formed 3D object.
