Subtraction dominoes include a 28 piece set on thick plastic dominoes. Dominoes come in a collectors tin for storage. Children will love the feel of real dominoes as they complete the subtraction matching game. Sold as 2 sets.- Educational Dominoes.- For 1-4 players.- 5+ years/Grade K-12.- Includes 2 sets (28 dominoes per set).- Package measures 4.7"" x 7.8"" x 3"".- Sold as 2 pieces/Bundle..