Bird’s Eye View After being introduced to the decimal system via the golden bead materials and number cards, the child combines the two: symbols and quantities. The numeral cards are printed in different colours to indicate the heirarchy of the decimal system. The units are green, the tens are blue, the hundreds are red, and the thousands are green. During this activity, the child will display all the units and the corresponding cards in a column on the right hand side of the mat, followed by tens, hundreds, and thousands, working from right to left. The child has an overview or a bird’s eye view of the golden beads and numeral cards together.