It’s okay.  The illustrations are cute.  The theme is a popular one in children’s lit:  the fun to be had in exercising one’s imagination.  It tells of a young boy and elderly neighbor and all they imagine from her front porch swing (the cat that casts a shadow of a tiger, the tree root they imagine to be a dangerous snake in the grass, etc.) But I think there are better books that follow the same theme.  This one lacks much in the way of pizzaz or story arc.