Square Triangle Round Skinny

What a Concept Four boldly colored, shaped board books packaged in a clear carrying case teach the concepts of Square Triangle Round Skinny by Vladimir Radunsky. A photo-collage of a slice of pizza (labeled) on a green-checked tablecloth appears in the triangle-shaped book; a dachshund takes up an entire long rectangular spread in the skinny book, and a clock appears (where else?) in the round book. (Apr.)