"Gallop! is a Scanimation picture book by Rufus Butler Seder.It is a bit like a modern day pop up book, as you open each page a different animal can be seen in motion, a running horse for example or a bird flying through the air.It works by having a striped perspex window on the right hand of each double page, as you open the page the artwork behind the window and the window itself are pulled alo" . . . . .