Image Item No. Description By  3437  Duplo, Brick 2 x 2 Catalog: Parts: DUPLO, Brick 2  31110  Duplo, Brick 2 x 2 x 2 Catalog: Parts: DUPLO, Brick 12  3011  Duplo, Brick 2 x 4 Catalog: Parts: DUPLO, Brick 26