Constructables! Natural Pine Wood Building Planks, 150pcs. by Imagination Generation Constructables! are the next stimulating challenge for the builder in your family 150 natural pine wood planks, endless possibilities. Imagination powered: no glue or tools required Completely age-independent, Constructables! grow up with their user as building skill develops Each plank is a uniform 4.65" long, .95" wide, and .25" thick for stable and secure construction We only use untreated and unprocessed cuts of natural pine that are safe for everyone