Book for use as playhouse, has rigid paper sheets folded several times to obtain final format of book, where sheets are placed vertically and in staggered rows around axis and are unfolded in right angle for forming rooms of playhouse

摘要

The book has four rigid paper sheets for forming rectangles and folded several times to obtain final format of the book. The folded sheets are connected by a spiral. The sheets are placed vertically and in staggered rows around an axis and are unfolded in right angle for forming rooms of a playhouse. Width and height of the book at initial state are 290 mm and 205 mm, respectively. The width and height of the book at final unfolded state is 900 mm and 205 mm, respectively.