Image Item No. Description By  41970  Duplo, Brick 1 x 2 x 2 Round Top Catalog: Parts: DUPLO, Brick 3  14222  Duplo, Brick 1 x 2 x 2 Round Top, Cut Away Sides Catalog: Parts: DUPLO, Brick 31  3437  Duplo, Brick 2 x 2 Catalog: Parts: DUPLO, Brick 43