Image Item No. Description  3068pb0021  Tile 2 x 2 with Computer Monitor without Power Switch Pattern Catalog: Parts: Tile, Decorated  3068pb0020  Tile 2 x 2 with DNA Double-Helix Pattern Catalog: Parts: Tile, Decorated  3068pb2457  Tile 2 x 2 with Fabuland Pretzel, '2', and Star Pattern Catalog: Parts: Tile, Decorated  3068pb0019  Tile 2 x 2 with Graduated Cylinder and Graph, Green Pattern Catalog: Parts: Tile, Decorated